Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f8fc4443c11677…

MALICIOUS

PDF

17.6 KB Created: 2020-10-30 01:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4015f9398902767e0b4a4a5317f222ed SHA-1: 2c4325e2623e3229527c8bc83bd0f3aae3abadc2 SHA-256: 85f8fc4443c116775f75edcd779ce67404e9c9178a6956f9718f4f0b04cd892c
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious due to heuristics indicating it's an image-only document with a click-outward action, designed as a phishing lure. It contains a link to a known malicious redirector infrastructure, which is the primary indicator of compromise. The document body, though heavily obfuscated, contains the same URL, suggesting the user is intended to click through to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • 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 17 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/strik?keyword=16+gauge+earrings+for+cartilage
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f89fb2437561.pdf
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f88a94ba83f0.pdf
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f8e1ac9c3095.pdf
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f8ded958641d.pdf
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5f92e51cc27ca.pdf
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f9414c896412.pdf
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f887db2a31b2.pdf
    • https://s3.amazonaws.com/dugibabafod/93769595291.pdf
    • https://s3.amazonaws.com/jeworurowam/sociology_syllabus.pdf
    • https://s3.amazonaws.com/fejatepudopito/dumowitarefisekogu.pdf
    • https://uploads.strikinglycdn.com/files/0f0f30ae-bc52-4732-ab22-5c862a9b9987/tipaz.pdf
    • https://cdn.shopify.com/s/files/1/0268/8611/1405/files/sharepoint_designer_2010_forms_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0479/6629/0076/files/dust_of_illusion.pdf

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