Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8af9812ebce6942…

MALICIOUS

PDF

56.1 KB Created: 2020-11-18 05:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4a79687fcb347379418986a4c7d9fec SHA-1: 3b8c1070227c47ac4a00816b8391c77cbd250da8 SHA-256: d8af9812ebce6942e2c1e4d03367e39356e233df3835229a84bbbc8f6b08309f
212 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting its purpose is to funnel users to potentially harmful sites. No scripts were extracted, but the presence of numerous external links strongly implies a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9818

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=invisible+maniac+1990
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/xizokawitigoro_sedawumenaj_guzamexumoke_zunopumuwifilo.pdf
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5f9981e350ebf.pdf
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8d32fd776ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3c641d06-fecb-4962-9384-35272dea27e5/67421793899.pdf
    • https://s3.amazonaws.com/forupokisip/36978668559.pdf
    • https://s3.amazonaws.com/vobuturinivi/free_printable_goodbye_elf_letter_templates.pdf
    • https://uploads.strikinglycdn.com/files/c3818797-4a6c-4193-8e3c-037b514cada8/watch_avengers_endgame_online_on_putlockers.pdf
    • https://uploads.strikinglycdn.com/files/5cfd6795-61f3-4f72-83fb-46b2821d7349/19528702448.pdf
    • https://s3.amazonaws.com/visagogijulep/fawetagos.pdf
    • https://uploads.strikinglycdn.com/files/514a1601-f68e-4e80-ac4b-3d57f74b6e40/66712537468.pdf
    • https://s3.amazonaws.com/fexuror/the_moving_man_worksheet_and_answer_key.pdf
    • https://s3.amazonaws.com/vavale/toyota_pickup_factory_service_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39a.bin
1c0eb7cca922266c5b8e666b694f3461204129de895261e9a07549e0f4aa49d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC39A 5336 bytes

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