Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f039a4d51494cc…

MALICIOUS

PDF

70.1 KB Created: 2020-12-23 09:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f048138c55207c77e2c97d995f67ebbd SHA-1: bab56cc5904450525891db592f4c81db83630597 SHA-256: b4f039a4d51494cc61659088b3f902590e80e8a0dbe384b56673bfdc20370fa1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?utm_term=liquid+chromatography+lab+kool+aid+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f950bb9c7450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fced1cd80ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_5fd77ff8c8d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f9392f6626df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fbf4ecb53c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_5fc3405c7d510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5fe2516fef47c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gupawupigawono/short_textbook_of_anaesthesia_ajay_yadav.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/gipofasiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfb50fa-9c04-4bd4-989f-0ebded26ff8e/driverack_pa2_manual_espaol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf45aa97599144ebcecd0/1606284379245/30414577054.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F7 5836 bytes
SHA-256: 85bd6cfcb673ebb05b9d5e3320c7ee0645484f3022cfd5ad8a55adf2591f12b8
font_01_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 10940 bytes
SHA-256: ae0a576002dbfe86b701639b39881024fbf7a2d14914db56468cb8bf2bfc20d0
font_02_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.