MAL-2026-18289: Malicious code in paychex-pdftron (npm)

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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.

Source: ghsa-malware (f176a5672301d76d7c08b93a46b074c23cdf0d36d46324d30dc8aceaa55ed707) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.