MAL-2026-18289

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/paychex-pdftron/MAL-2026-18289.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18289
Published
2026-10-25T14:42:30Z
Modified
2026-10-25T15:30:04Z
Summary
Malicious code in paychex-pdftron (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (d32ec8b2ca67156d94943a27b9b7c98f1888d530d7a6f947e49b40f52ec054b3)

paychex-pdftron@99.9.1 ships an empty stub (module.exports = {}) and declares its sole dependency ltidisafe as a bare HTTPS tarball URL (https://ltidi.storage.googleapis.com/depenconf/ltidisafe-4.0.5.tgz) rather than a registry version range. On npm install, npm fetches whatever bytes that URL returns and installs the resulting package, executing any lifecycle scripts it contains — with no version pin, no integrity hash, and no signature verification. The package name resembles an internal Paychex scope, the version is an implausibly high 99.9.1 (a dependency-confusion resolution tactic), the URL path segment is depenconf, and the host is unrelated to any legitimate Paychex or pdftron domain. The manifest alone is the attack surface: resolving this dependency pulls attacker-controlled code into the installer's build environment.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021684",
            "import_time":  "2026-10-25T15:15:13.530209881Z",
            "modified_time":  "2026-10-25T14:42:30Z",
            "sha256":  "d32ec8b2ca67156d94943a27b9b7c98f1888d530d7a6f947e49b40f52ec054b3",
            "source":  "amazon-inspector",
            "versions":  [
                "99.9.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / paychex-pdftron

Package

Name
paychex-pdftron
View open source insights on deps.dev
Purl
pkg:npm/paychex-pdftron

Affected ranges

Affected versions

99.*
99.9.1

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "package.json",
            "sha256":  "c38000f81b723958cac533ddaaf7ccb7ea3b61fd3e3505914f41728fe225b544",
            "tlsh":  "63e0c2204aa266334ec611b6892a665bf3728e9f4808bc1c6edb041c519db7329f925c"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "paychex-pdftron-99.9.1.tgz",
            "hashes":  {
                "sha1":  "e20aaebe8e0b1cfe01b6afcaa7738c56f5022170",
                "sha512_sri":  "sha512-pZqtLBeukEMcPQYRNsGX0eL0FCMhzWxe22Pwl7El3L57A0FhPbQwBECc/Z+6GNj+uvAicj9IEsJqpUkxcC58GA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/paychex-pdftron/MAL-2026-18289.json"