Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2b21eb1449bab3…

MALICIOUS

PDF

74.2 KB Created: 2020-12-11 18:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bae491b5b218f53a074989cfd3d5172 SHA-1: 15774c0561153ef00f624adbe125ef09f17580b9 SHA-256: ec2b21eb1449bab350bfe002d684915091ae3ba7477b628203f99c71030bdddb
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'gettraff.ru', a known malicious domain. The document body, though heavily obfuscated, suggests a lure related to 'printable tee shirt order forms' and includes a call-to-action phrase, aligning with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=printable+tee+shirt+order+forms
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fa88f0167691.pdf
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd1f23c0ebb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donukadizolin/guidelines_management_of_diabetes_type_2.pdf
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fcba569bce7087d1ae1be83/1607181673863/uncharted_wars_oceans_and_empires.pdf
    • https://static1.squarespace.com/static/5fc11fba3398ff75152f6203/t/5fc6fa6a6beae454315a28c3/1606875759438/super_walmart_hair_salon_near_me.pdf
    • https://static1.squarespace.com/static/5fc0b3f1d49dd12447331c2b/t/5fcce6b483d2ac65cc13ced7/1607263925202/79671195557.pdf
    • https://s3.amazonaws.com/winumigutam/5109392920.pdf
    • https://s3.amazonaws.com/kofabube/zakiwoxagulunup.pdf
    • https://static1.squarespace.com/static/5fc526639955c744b556fee0/t/5fc610369b1ed03538ada43f/1606815800299/logitech_k520_keyboard_manual.pdf
    • https://s3.amazonaws.com/tadovu/molluscum_warts_contagious.pdf
    • https://static1.squarespace.com/static/5fc66f5c6b97992eb581654e/t/5fcd47cd662d5e24e0b06519/1607288781292/marvel_unlimited_promo_code_december_2019.pdf
    • https://static1.squarespace.com/static/5fc66c5011f6a41984ab7b42/t/5fc90eb558026e01688b84f2/1607012029923/account_planner_marketing_job_description.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd07e0d334513fae436bf7/1606223841740/2300705952.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5db.bin
2558d580e06d12d35c999afccbffc7407e2afb1950ce647e07fc2c3cd289e0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 5288 bytes
font_01_sfnt_off0000f7a3.bin
f960de161147e96c4fdfdfd4180ced898b362df2505830e01a61501fed266e0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 10572 bytes

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