Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2a409bbb794391…

MALICIOUS

PDF

66.4 KB Created: 2020-12-18 04:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 29e24d7bc9a32a976d95ddcdf932d034 SHA-1: c4f98cc9bee88484e2f745ae4d2d85ca4d21a1d4 SHA-256: 1a2a409bbb794391fa5f2afb30239081c1e4cb5ada1c52f794db89e10bf64952
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, with one pointing to 'trafftec.ru', suggests an attempt to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=toy+story+box+set PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fcba4dee7d1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_5fca4f65951f0.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/f8d6cbf8.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/sozufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0eacbc14dfd36fef1915a/t/5fc4aed43c02f22b9da11935/1606725332439/gexalitinadof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58581200-6dbd-425c-b836-4ab3ab5e44b2/passion_lisa_valdez_read_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe104f645712565401bea9/1606291535771/eso_damage_magicka_poison_ix_vulnerability_ravage_magicka_ravage_stamina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3faedabee7b44068fcc/1606218753304/scp_medical_department_roblox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6592ae9fc3622d5471997/t/5fd62b4196ed101a3e3921bc/1607871298361/56732333580.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd017668bfc51861688c6a/1606222198937/written_statement_for_not_filing_taxes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c384116eb00e3c6d5904/t/5fc897d6d32d012678fdbd9e/1606981591489/vewiwoxodakawol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d024a87939686421378a/t/5fd176be1693665fc7c79433/1607562942452/trickshot_deathrun_code.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_off0000c5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E4 4696 bytes
SHA-256: 69f697c612eb02d10d9133b3861e4cfea68ad198d302e17a7ab89b3242d16666
font_01_sfnt_off0000d5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F9 11536 bytes
SHA-256: 97ba32aef274e6cf28655ec1a047ba72eb4229d9ae2f9eb4aa2838ad1db78c41

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