Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d81b69b4b52a4c1…

MALICIOUS

PDF

72.8 KB Created: 2020-11-18 18:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3312df680476f21f6191738bfc168770 SHA-1: 7a2907c70a0dbd1d52a647f2a3fcb1d3162fd079 SHA-256: 8d81b69b4b52a4c1b4914e4fe685c43932c3d103122b34af05775c35f718db76
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 'https://gettraff.ru/123?utm_term=the+devil%2527s+highway'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV also flagged the PDF as malicious, reinforcing this assessment. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=the+devil%2527s+highway In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5faa7ab4f3bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5fa7536f16d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8941631fea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5f97530a11f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fa30cf29647d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5f8fd1bfc9266.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/df58cbd4-d130-4f52-86d4-540296f2bbee/driverpack_solution_17.9.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc32dfab-aa00-432f-9c4f-27da27ad22de/77817351426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de233b6b-23d1-4d74-b145-743150d9e32b/tinopozagutev.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/observations_based_on_sensory_integration_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb2eed5-29bf-405b-b520-a6dda85e556c/44534402422.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_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 5228 bytes
SHA-256: e16b2724aa7f8876617f69ba783536c4f112bd70494e3567370670fce74daafe
font_01_sfnt_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 11820 bytes
SHA-256: 3227fd9bac9c21405c0f2e37cf57039bff43457314d628336b3ce8f365c45faa

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