Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6103161e77e90e9…

MALICIOUS

PDF

76.8 KB Created: 2020-12-21 16:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb04258f1250ce336619b3efab5863b SHA-1: 198cdc1ea5263d34078e997684d64c6154d7f2d5 SHA-256: a6103161e77e90e99ef5fd7db95cb0ba3a04044185d51185d292471f166e4700
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is disguised as a poker tournament manager. This indicates a phishing attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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
  • 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://traffmen.ru/strik?utm_term=poker+tournament+manager+online
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fb72ccd33dde.pdf
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5fc02b5279296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sitok/mixed_breed_dog_crossword_answer.pdf
    • https://s3.amazonaws.com/pezofut/fogire.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf104b4c4d833b8bc7cae/1606218018850/89858499807.pdf
    • https://uploads.strikinglycdn.com/files/d6469462-7e86-4c6d-b88a-f3ce6c299475/breville_juice_fountain_compact_instruction_manual.pdf
    • https://s3.amazonaws.com/pasawe/premiere_pro_cs6_templates.pdf
    • https://uploads.strikinglycdn.com/files/dfbec5f7-e57e-4af9-8856-89eebf613ba0/wow_enhancement_shaman_azerite_traits_pvp.pdf
    • https://s3.amazonaws.com/dobikasukavu/2010_chrysler_sebring_repair_manual.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09e2e18c5c478ec2d9fd/1606289891009/tenelit.pdf
    • https://uploads.strikinglycdn.com/files/b3e8d224-9781-4f01-85a4-1e0b5fcc3b37/taxubopenuruvofodex.pdf
    • https://static1.squarespace.com/static/5fc519b07d0c8f249d5c1082/t/5fcb518585bc3a28a608a114/1607160199239/raiderio_addon_see_own_score.pdf
    • https://uploads.strikinglycdn.com/files/bc581e8f-8ce9-46c2-82dc-412294f127ed/povekiwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e415.bin
57be8ba05f48bf59d2b5ff7fcc08cd7f0bc82edae1b9158bdad842bd93c97e76
pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 4772 bytes
font_01_sfnt_off0000f435.bin
71b9e3c8551fa7ec85cf0e79afbc7099e9be3822a0925377ea2b45e48264f303
pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 10572 bytes
font_02_sfnt_off00011862.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11862 4324 bytes