Malicious PDF — malware analysis report

Static analysis result for SHA-256 4504d1afbb98c78f…

MALICIOUS

PDF

69.9 KB Created: 2020-11-30 03:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7219c545c2efefc77d0d0d4b6e3b53f1 SHA-1: 1cf3eb029e9985e9897a750b422ab74dba2a8e9a SHA-256: 4504d1afbb98c78f484371ae1ef1197153b9532bde6a51a5f22ab90ebebcc5cd
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=princeton+university+academic+calendar+spring+2019'. This URL is likely used to lead the user to a phishing page or to download a secondary payload. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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://gettraff.ru/123?utm_term=princeton+university+academic+calendar+spring+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f89b3b441dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fa5f84942e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f875f3d0ec1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fb97ff6aff43.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/kodipopujufipig/xorutijikorokodeninitupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8835110-5e48-474b-939f-76b91b0f6109/mezenogudesamojiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/como_se_forma_un_enlace_glucosidico.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/xiviwekirilafopepivexanem.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/86949325418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495f3075-e4af-4697-bf75-1c10a6d35f0d/opentext_costing_model.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/gojobupuwadokoda.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/geresireg.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/yuan_ti_gods_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/integers_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/98846381176.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_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 6036 bytes
SHA-256: 2b0a25e2719d7f3d5b20327c7d8be767120b710bb4bf91409bb6ad97ec5f67b5
font_01_sfnt_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 11520 bytes
SHA-256: b78ae16d4c787a03baf2965c10fe81b0b02cbcd03e22e9d3d54db41986950db4

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