Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b70d15a50efde3…

MALICIOUS

PDF

91.3 KB Created: 2020-11-25 02:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e2d175774ef97604e3e81f105295bd2a SHA-1: 0b9b97b9c5f441eba48c7cb05adc56db0df958dc SHA-256: 97b70d15a50efde3f148272ee3b88b63bddc084b1e44eeb10368ba0e5eb68143
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://cctraff.ru/123?utm_term=unit+filing+system'. 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 nature of the redirector suggests a phishing or malware delivery attempt.

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://cctraff.ru/123?utm_term=unit+filing+system In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8acebf17aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470542/normal_5faa2c2a44250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5fb51c1ef1dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fa3557e43ee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5f911134659d4.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://uploads.strikinglycdn.com/files/1be33feb-ec6b-4283-b72c-eaafe93bccd0/counter_strike_1.16.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/romarorusisarilenalumepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bae7c92-4dfb-4260-8d03-46d2b2021e96/fotos_sexis_de_valentino_lanus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f044b657-ae82-486b-bf7a-9ec5ef251ee0/52862178470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4bc0cb-2c72-4d3b-86a0-0333804540a9/fixinejulogolajop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20de8e71-d815-4c27-8727-dbe68c3c1cda/babuzevumiweleluwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717561dd-86c5-4198-ab19-9a45d73b578b/12901316198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7531cec9-ac35-4913-9afe-21c60da0a1d1/serod.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_off00011e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 4552 bytes
SHA-256: fe13161ab5ae3ba862f1258a8fde9af9d7590303ec4505140b8a126c38cddff5
font_01_sfnt_off00012dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD4 10628 bytes
SHA-256: 6648d975c497b83c1d307d0519eafb81726a593d86ecc62db51e8fec2557b38c
font_02_sfnt_off0001522c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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