Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4b2b766a3e002e…

MALICIOUS

PDF

91.8 KB Created: 2020-11-10 12:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d9cf465519e612c8e5b772cfe641550c SHA-1: d4b9c992eff039b3b161f7220b70e767a7e7dc88 SHA-256: 2a4b2b766a3e002e1a33edfaeab3b607b775f79d8af76c107bb925561f2a22de
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 'ggtraff.ru'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?keyword=bmw+e46+m3+smg+to+manual+conversion+cost In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_5fa89f04b918b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f92470b4645f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5f97781e59cc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f9a7a178da9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_5f992034d46f4.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/22e78ddf-3875-4dde-8876-fbb3a29b3f28/suboxofozobuxuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/29417601662.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/edema_agudo_pulmonar_medigraphic.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kamugofeviti.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/does_the_beauty_angel_rvt_30_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe7ec74-9b2c-41ce-ad57-3c42f8d7fb11/rukujagaze.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/zumezetovaderix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf80f2e-3a88-4575-82e1-146a79f66ed5/disney_roku_login.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/6328749640.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_off000128fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FB 5728 bytes
SHA-256: 39822885cbc91f18ee9455be112c1db35a2178a28fa42bbb14b911ef478c7cc8
font_01_sfnt_off00013c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C82 11112 bytes
SHA-256: 15d951de08a257ee1cf7eca518903f9ec307109cc675fa5c0425152cf3304cae

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