Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df93203b90aa5a0…

MALICIOUS

PDF

65.5 KB Created: 2020-12-16 16:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4696d74e319037a212fa823c8c2720 SHA-1: 93e51530b91f62543b6d1c9382e9f59d55656ac0 SHA-256: 6df93203b90aa5a0cf95f3d88fdef4f24a5896a5e41a43372cb1a5423c735f78
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://traffmen.ru/123?utm_term=onalaska+show+choir+classic+2020'. This URL is known to be associated with malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its content, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=onalaska+show+choir+classic+2020
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5fd9681fc2c37.pdf
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5fa3803faf6f0.pdf
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f9cec2a4f8cf.pdf
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fd741e2821f1.pdf
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f8f7e1717097.pdf
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8755e6db94a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/biwubeleba/john_winters_md_cheyenne.pdf
    • https://s3.amazonaws.com/paropabaru/coleman_pop_up_trailer_parts.pdf
    • https://uploads.strikinglycdn.com/files/c3edfa8f-7a83-472f-9fa6-f3785d3bafc0/sanacion_akashica_david_topi.pdf
    • https://uploads.strikinglycdn.com/files/ea3db009-9ea6-4234-94cd-748345476f17/dark_souls_chaos_randomizer.pdf
    • https://uploads.strikinglycdn.com/files/a77f5cf1-5624-493d-86f5-40ee1283bd5c/xepewizipopipegabi.pdf
    • https://uploads.strikinglycdn.com/files/81bdf69d-cf64-43b5-a67b-195588ab7e85/asis_professional_investigator_manual.pdf
    • https://s3.amazonaws.com/wupagivoz/pioneer_mixtrax_manual.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_off0000c061.bin
d8632635987bcf51a3792d7cf928f9481cd9b155550431726c53ff9d9bee5025
pdf-font-stream PDF embedded font (sfnt) at offset 0xC061 5344 bytes
font_01_sfnt_off0000d295.bin
55b7d22318dc1e8a2beed0c00d19941b9997cbfc5bd89f15b8e7a07879eac52b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 11696 bytes