Malicious PDF — malware analysis report

Static analysis result for SHA-256 5101a90c1eefb099…

MALICIOUS

PDF

16.6 KB Created: 2020-11-05 21:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 74452dfa7d7f8835b5d19d559ff7d41a SHA-1: 770c3eebaf9d77e540b336500ed5da652c5f2d7d SHA-256: 5101a90c1eefb099838e54460c0106648513f3cf5230b3781edccdb69797db7c
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure related to 'annotation guide for students' and a high-severity heuristic indicates it links to an SEO redirector. This redirector points to the URL https://traffnew.ru/aws?keyword=annotation+guide+for+students, which is likely used for phishing or to deliver a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?keyword=annotation+guide+for+students PDF link annotation