Malicious PDF — malware analysis report

Static analysis result for SHA-256 494b3314ceac9a62…

MALICIOUS

PDF

67.6 KB Created: 2020-12-19 07:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: db3950c0310d7caac67e8d8862966888 SHA-1: bf74fc8233efdb17586aebf33bb295cc4c0e6037 SHA-256: 494b3314ceac9a625eb01ee480d48be4d84ba30955d8ab57d8dd468f90e9a1ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/strik?utm_term=virtual+gum+shoe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_5f95ee513ca35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5fb6ae7133851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f938631aff75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f9c9f0cb66a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5fa169bda567b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f93cd570fadd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f906f2d0ff21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5561fd-65b3-4ab4-8a9e-c96a870d54eb/96364947257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa046aa-d1e4-409c-af39-6310a4961e64/xofimatodasux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc004221-dd2a-4a6d-acaa-51b3a9d27f1e/47110476204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400bad2e-6e58-4223-8780-5c0171cbf764/juxevid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e95aad2-acfc-4f7c-a0c6-4fb647d7d80d/golf_league_tracking_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5efdbb1-1e4e-4a85-9d9d-108b626af588/clopidogrel_davis_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1da589c-181b-4253-b69b-de9495134bec/lancaster_bike_club_meetup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4092fc46-87b5-4edb-b9c3-0b2ff9db0b49/91207771612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decd1119-a1ba-4743-b6b4-ec2dce891083/41748734849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b946b8d-52e5-404d-8a82-bb7a47175eb8/sezagez.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDE 5064 bytes
SHA-256: e2b2968b975595f9a252d8f28ce10886be0d3adfbad6a0d45d48e9e45d5cd664
font_01_sfnt_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 9860 bytes
SHA-256: 288e12b23e7a53b079910d84ae48278e3cb0f6a707ffb9e4f6d4638bda290c35

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