Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fa83a6ffc2385f…

MALICIOUS

PDF

16.0 KB Created: 2020-10-18 08:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4c6d6404cddfef6c732d6da6b9cea18 SHA-1: 2ef98eb83a3c6c68ba1fd487a80cb858c4a53d94 SHA-256: d8fa83a6ffc2385fdc6e91de0cd619b5b13ed379fad8bde5ab834dcc7a44d084
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document designed as a lure, containing a clickable link to a known malicious redirector. The document body, though heavily obfuscated, contains embedded URLs that likely lead to further malicious content or phishing pages. The presence of numerous external PDF links suggests a link farm intended to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 16 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://ttraff.com/123?keyword=hercolubus+o+planeta+rojo+pdf+espa%25C3%25B1ol
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f88109e47b5b.pdf
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f876367750a0.pdf
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f8b73f68e3a2.pdf
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f88a03c33a92.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8b70b3b0445.pdf
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f896f5f2e5aa.pdf
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f88fb24473cf.pdf
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f87b1ba38d68.pdf
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8880fe21abe.pdf
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f8b9d783ad77.pdf
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f87faac3ab42.pdf
    • https://uploads.strikinglycdn.com/files/7031f5b0-7679-4b4c-b42d-918dc5831950/vikumagogixutif.pdf
    • https://uploads.strikinglycdn.com/files/cffd54a9-71b5-4dbf-9d44-d524d7baac51/xivodidowanam.pdf
    • https://uploads.strikinglycdn.com/files/3da26133-a394-430f-8589-c469b0932c8f/zasijetilejogesexazixet.pdf
    • https://uploads.strikinglycdn.com/files/2cde1406-5db2-495a-8232-ea02aa952cc6/domon.pdf
    • https://uploads.strikinglycdn.com/files/68d59294-472d-44dc-8308-41206a6ed01d/sobudinotivavujekozi.pdf
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/80973639829.pdf
    • https://cdn.shopify.com/s/files/1/0499/3915/3054/files/circulo_de_quintas_piano.pdf
    • https://cdn.shopify.com/s/files/1/0484/3120/2472/files/99431578352.pdf
    • https://cdn.shopify.com/s/files/1/0488/0200/5157/files/naked_and_afraid_necklace.pdf
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/17800997374.pdf
    • https://cdn.shopify.com/s/files/1/0268/6831/8384/files/maersk_german_shipping_company.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/63542344513.pdf
    • https://cdn.shopify.com/s/files/1/0495/9843/1381/files/no_mans_sky_freighter_types.pdf