Malicious PDF — malware analysis report

Static analysis result for SHA-256 781ff976fd311667…

MALICIOUS

PDF

16.0 KB Created: 2020-10-25 12:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4116f3c67e3e83996e7de3da771617a7 SHA-1: 4363fc6636ca153e40b771c557f015656472f648 SHA-256: 781ff976fd3116679b797af3483a7a201b887f5090c8cd517fb1693172c4a5de
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a 'router keygen' download, which is a common lure for phishing or malware distribution. Heuristics indicate the link points to known malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=router+keygen+android+2020 In PDF document text