Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e816df6830f7d09…

MALICIOUS

PDF

75.7 KB Created: 2020-12-26 12:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b9b530f34d0e71e276ed0918736c5818 SHA-1: 73050beeeb81d6305fc87e53ce3aeec787b41cb5 SHA-256: 4e816df6830f7d094db6edf93147bddc14457aa3e09dcf25de87e582f1a501a0
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is presented in the document body, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector and the ClamAV detection indicate a malicious intent to lead the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=wheel+race+mod+apk+download In PDF document text
    • https://cdn.sqhk.co/mozepemera/dgiFjh4/54873449695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5fe2bfd01abd0.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/zjhprzo/votafan.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/fosagobomap/ubiquiti_edge_router_poe_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/81293136527.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/accomplishment_report_for_ojt_students.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/basic_iq_test_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/hoke_county_schools_bucks.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/pixel_hero_warfare_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/regawije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c8afdb-f358-416b-841e-13e2530ced0f/34914307261.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/48229318230.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 5304 bytes
SHA-256: b16c205ccdebbd94e276c5f6c7fe58e23887654722052c965284209fff84acd9
font_01_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 11640 bytes
SHA-256: 419d2dc70860c4beffa330fcdddc23929f7719801b5ea397590d316bfbceb6b7

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