Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c595acd3eaee7be…

MALICIOUS

PDF

64.2 KB Created: 2020-12-10 09:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3b84bcc55b39b090bd3fa8396749ceed SHA-1: 1d898493d1c024d89e1cb939eb98509d12c1ea8d SHA-256: 6c595acd3eaee7be52a3c42806a8a03c759911ad4f2afb35a60e9b9e4eacfd83
162 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 'traffking.ru'. ML classification also strongly indicates maliciousness. The embedded URL is likely intended to lure the user into clicking it, leading to a phishing site or malware download. No scripts were extracted, but the PDF structure and redirector URL are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/123?utm_term=coat+of+arms+template+to+print In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5fc0a04fd9b59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdf74ab-c9e1-4070-921f-ef570696dd72/what_is_dolby_access.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2038190b057dd37e6613/t/5fd122f4a907cd28a3468caf/1607541497999/lelotabijaperujutanimom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58165f7cf8c754049f2ca/t/5fcc8c1b1e1a4d7de124beb9/1607240735231/worudubafusiripotuv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5135716f6d44b07d97325/t/5fc692a5fa04221c7105c02a/1606849189940/15079675983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df527d8-5666-49a0-9a7c-912b24f626f0/97748799794.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cf8bf9866f3fd2ed119a/t/5fcddc095177ea328ce48eb1/1607326730343/30649571259.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/41815687141.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc54fce173fb5383b532a6d/1606766542453/fire_sense_patio_heater_costco_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/74435889168.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/92270362261.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_off0000c035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC035 4952 bytes
SHA-256: 32878cfb4faca982e42fac11b8dbdbd4f5168f7330fbbc39584e6f28e13a9886
font_01_sfnt_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 10420 bytes
SHA-256: c446572972d68f2fad3951b9d19e004bf9956cf7d6b7b134ff0f51682b12e0f4

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