Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8cebbac641961c4…

MALICIOUS

PDF

67.6 KB Created: 2020-11-13 08:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2f7fb2c9d8e39172f2316a51744070 SHA-1: e44434b8aaa854f76b19965cef74ef414b5e56fa SHA-256: b8cebbac641961c4bd765ea82d47f800fc313541cbaa9e15b6d57456ababd068
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=java+jdk++windows+8.+1+64+bit'. This indicates the document's primary purpose is to redirect users to potentially harmful websites. The ML classifier and ClamAV also flagged the file as malicious, supporting this assessment. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6329

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=java+jdk++windows+8.+1+64+bit
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/zowoderazobuzagos.pdf
    • https://gipavibipo.weebly.com/uploads/1/3/4/6/134654588/javujitozudalizi.pdf
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/4c2cb17da89382.pdf
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/pexelilekarekow-xerepeladu.pdf
    • https://uploads.strikinglycdn.com/files/088c1518-0a58-482b-9f31-dd688a0ea06d/wokebazoxofukufifor.pdf
    • https://uploads.strikinglycdn.com/files/42ac7e72-efd5-4f9a-becc-95512e277aaa/dungeons_and_dragons_hobgoblin.pdf

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