Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37b55b60d1e5810…

MALICIOUS

PDF

49.6 KB Created: 2020-11-18 07:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb5862658a6a469a5b049c81947f1cd SHA-1: 95adf2ffa61ec4a21cad4dd9b82a739d239a9739 SHA-256: d37b55b60d1e5810379e28eeac897d7097cae29a8bcde42035159188bb440669
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a phishing lure, employing an image-based design to conceal a malicious redirect link. The document contains numerous links to external PDFs, likely for SEO manipulation or to obscure the final malicious destination. The primary malicious URL identified is https://ggtraff.ru/aws?utm_term=macos+catalina++installer, which is flagged as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6643

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 49 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://ggtraff.ru/aws?utm_term=macos+catalina++installer
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5fa5ff7ad68cc.pdf
    • https://cdn-cms.f-static.net/uploads/4408174/normal_5f9bd9c7252ab.pdf
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/5820035.pdf
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/68d1af58b.pdf
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5f9af2148b1e0.pdf
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f9d96987a7a4.pdf
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5fa8364955ec3.pdf
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5faf06f986b4a.pdf
    • https://cdn-cms.f-static.net/uploads/4464080/normal_5fab0abf71832.pdf
    • https://uploads.strikinglycdn.com/files/183ea9ba-e5d3-48ab-be6b-47ed9f36d12e/codigo_activacion_autocad_2014.pdf
    • https://uploads.strikinglycdn.com/files/5dd91011-ba01-42ac-973b-31e8cbeac8c4/84883525453.pdf
    • https://uploads.strikinglycdn.com/files/e5373ee9-16eb-47b0-8e2b-6f22fba4dc9a/gm_window_guide_clips.pdf

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