Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ad738cce082a13…

MALICIOUS

PDF

50.6 KB Created: 2020-11-18 11:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8adcefd10534fcc911f23078b4ccb7c7 SHA-1: 500592e01c65035dd42a366a4c2a5bea512555b9 SHA-256: 87ad738cce082a13c26cefe42c55e3e41b0d7b6009d78b60d2d23bcbbaa91884
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed for SEO manipulation. The primary URL, 'trafffi.ru', is suspicious and likely leads to a phishing or malware distribution site. While no scripts were explicitly extracted, the presence of external links and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5258

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=eaton+chspt2ultra+installation+manual
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/8125054.pdf
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/b4041e2a1b8351.pdf
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/61fa7da624.pdf
    • https://s3.amazonaws.com/wonoti/corner_bakery_cafe_catering_menu.pdf
    • https://uploads.strikinglycdn.com/files/aa969948-e3f6-4cbb-8352-190428b6c661/56257664556.pdf
    • https://uploads.strikinglycdn.com/files/1e464b68-b8db-4c0c-9368-bd5395b99b64/98885786904.pdf
    • https://uploads.strikinglycdn.com/files/f134e0bd-c23a-44fe-924f-550bb6b599b9/61895370450.pdf
    • https://uploads.strikinglycdn.com/files/ac211f2f-7251-406b-ae41-ea4225a429f6/vimukolozesamazowilapibur.pdf
    • https://s3.amazonaws.com/neviwove/anchors_aweigh_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/1bb3e5e8-3c1b-49f7-8793-1c4aba81956f/66526873440.pdf
    • https://uploads.strikinglycdn.com/files/9e2a39f0-ff29-4aa5-9c9a-59c5aa2c537a/rejiga.pdf

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