Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb113e8edbedb98…

MALICIOUS

PDF

19.8 KB Created: 2020-10-31 05:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fe1e6da2d2fd2bc5e04cc481579110 SHA-1: 0784c677a8e71e60869eab7c2cb94d3416372717 SHA-256: 7cb113e8edbedb984eec274fbe97c5539a9b7b6cb720c88e5b9719f32698d22b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a free piano PDF but containing a screenshot that hides a malicious redirector link. The primary malicious URL, https://gettraff.ru/wb?keyword=from%20now%20on%20piano%20pdf%20free, is identified as a known malicious redirector. The document also contains a large number of external links, suggesting it is part of a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 4

  • 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.
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 19 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://gettraff.ru/wb?keyword=from%20now%20on%20piano%20pdf%20free
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f89f35c02dbc.pdf
    • https://cdn-cms.f-static.net/uploads/4412181/normal_5f9c36319452b.pdf
    • https://uploads.strikinglycdn.com/files/fced4bd5-b8a4-406f-9318-e9937702adae/kujasojufijar.pdf
    • https://uploads.strikinglycdn.com/files/eac829de-99a7-4c0f-b2ff-37ace7016740/57463075125.pdf
    • https://cdn.shopify.com/s/files/1/0477/1954/7036/files/sin_of_greed_symbol.pdf
    • https://s3.amazonaws.com/mamukawaxatali/40k_army_builder_app.pdf
    • https://uploads.strikinglycdn.com/files/c75bb360-267b-4bd9-98f2-7ea70a57a97b/bifogasirosigowananupasaz.pdf
    • https://s3.amazonaws.com/sugaguxagu/55151798573.pdf
    • https://uploads.strikinglycdn.com/files/9c833dce-fcd8-4f59-9a6f-3c6ff7aa2deb/kinetic_family_drawing_questions.pdf

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