Malicious PDF — malware analysis report

Static analysis result for SHA-256 351ec0c00f97d770…

MALICIOUS

PDF

75.0 KB Created: 2021-01-02 22:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 548cd0d801bcbefa541610d2c34f6fff SHA-1: 96ca5e4c5ae3209e928f72f507e432641ff03c93 SHA-256: 351ec0c00f97d770c608b4d7de6b461b18c8416e539937181a4e07850aeb23f0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://cctraff.ru/123?utm_term=lonely+planet+burma'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the malicious link suggests a phishing or redirection attempt, likely to deliver a further payload or lead the user to a fraudulent site.

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=lonely+planet+burma In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fa420f16f1d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5fab6c50311a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5fee1d3cac3f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fca44ca06dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8e0fd830f65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389581/normal_5fe3b5fe6aa2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f9598e818f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5fb5b84543240.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/62e15ea5-563d-434e-bd20-6372ae13ad81/pavuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb0b466-bdb8-476b-9b38-8cf64d2d6f03/poxejiporidokigoruna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83476409-01df-4d42-80b2-871a001e6231/74937554234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a759b0b-c9cb-45f5-b735-8be7f55a7a7b/56381329188.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/96707664156.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_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 4968 bytes
SHA-256: 612e9dea9f5d3a252cdcd6fb763129148bab9bb91b11f094d867352db52ec37d
font_01_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 11032 bytes
SHA-256: 28bd15c7bc20cc85c4ea5d9b1234243c87f564ef42b0831290ef46b0528deb4c

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