Malicious PDF — malware analysis report

Static analysis result for SHA-256 e697f5bb639681da…

MALICIOUS

PDF

81.1 KB Created: 2020-12-27 17:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bbffbfe5af1c1cab4db3093af5811cd4 SHA-1: 720712da02f9a5fee35d03c9d4a90952b4807576 SHA-256: e697f5bb639681daa9f1c63d250ad57cbf681af7b40552a69db0f35db507df2b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of malicious intent. Heuristics indicate the document is a password-protected archive lure and a browser installation lure, suggesting it's designed to trick the user into downloading and executing further malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=post+it+note+app+for+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_5f9cb0d1348ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/56819805543.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/tutelawuzejexij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ab0480-8540-4045-b843-7af9f52764cd/judax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7239d53-c0eb-4e65-9d78-c8aa71c64bec/7817029143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8204d4-3859-4bc0-ae97-4850cb7c0bf8/lanunomadizij.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/65131083093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10afa083-ad30-455f-9724-f7514a15b51a/what_happened_during_the_ice_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6f21e0-42de-4327-9a3f-81acbb367e0c/monster_inc_drawings_cute.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/duwuzawejudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8f7898-1051-402e-823a-9eadef935996/garmin_vivosmart_3_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/memepazojisop.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 5128 bytes
SHA-256: 62ed3c4942143651011a78eb44e0286efdf515e193e31bd9876d5dcb1ab3ab84
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 11204 bytes
SHA-256: 446bb32cf6b1343bc78d6feb830c7c4334227335864bf68e26be41d96f713177
font_02_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 16704 bytes
SHA-256: 0ef021f5fce7a380ffc4cf625f132e2c51205c0aa23cc9840142dcbf9b51de56

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