Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68ebda81dacf083…

MALICIOUS

PDF

52.6 KB Created: 2021-01-04 00:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c008b39607f0974266b13e4cf08bd668 SHA-1: c8798e00b1ac7352cf12a5cee76c50f2b08c60d3 SHA-256: c68ebda81dacf08350743458a69d3797a02933d8c5c55c820f40eb9a4e4c2ef9
202 Risk Score

Malware Insights

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

The PDF is an image-only document designed as a lure, containing a clickable link that redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL 'https://gettraff.ru/aws?utm_term=conditional+entropy+in+information+theory' as malicious. The document's structure and the presence of multiple disposable links suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6064

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 52 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=conditional+entropy+in+information+theory
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/4986483.pdf
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/jeratubaj.pdf
    • https://cdn.sqhk.co/gerukoso/ajfb6iq/for_you_tiktok_trick.pdf
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f9fc509aad2d.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/gasir-musal-ralovojezosojok.pdf
    • https://lojedakefedo.weebly.com/uploads/1/3/4/7/134743006/xekesogotunosaf-favetoderibudos-gezofulu-vasaza.pdf
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fd7867f66c10.pdf
    • https://s3.amazonaws.com/xupovobejanam/baxi_luna_boiler_manual.pdf
    • https://s3.amazonaws.com/nopomewegobij/matrix_foundation_student_s_book_answers.pdf
    • https://uploads.strikinglycdn.com/files/52a716cc-9ceb-4659-aa5e-243a73e8b589/96637707327.pdf
    • https://s3.amazonaws.com/zetituri/mcgraw_hill_connect_managerial_accounting_test_answers.pdf

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