Malicious PDF — malware analysis report

Static analysis result for SHA-256 937bb52e94d20957…

MALICIOUS

PDF

67.1 KB Created: 2020-12-22 17:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 870c397df1bd9330c10f5a23f94f03bc SHA-1: 19f5235a8e11cd1c765bef01b26bc1c17d971b3f SHA-256: 937bb52e94d2095742fcf1b45324fad92b6bdbd62a63b94186c0061c2f24585e
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://gettraff.ru/123?utm_term=s+articulation+sentences'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery, and is often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=s+articulation+sentences In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_5f9b7a1868520.pdfIn PDF document text
    • https://xipazodi.weebly.com/uploads/1/3/4/3/134375507/e2479799d8.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/nobosuzi.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/fomeliwog.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/rokoguz-ponikexeruf.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/fd6c923a-4339-4a90-87d6-960bef9a427c/79354611970.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce71dd301bb951f8bebd34/t/5fd20767b91f50015ef35e0a/1607599975318/sky_sports_score_centre_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c6d242e893f6741e21c/t/5fdcfb1765c797038f8332fb/1608317720391/xirexavojet.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/mowezesexavetazivozokux.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_off0000ce63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 4896 bytes
SHA-256: ebf47bd8e0096c4bf834e8329ecfa3de6d84b465dd7fe218644d418a6c536be9
font_01_sfnt_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 9744 bytes
SHA-256: 339f62d25d608184d5aac3cef5a090a6f4f8ef57bd21eaff8216554181a2ec85