Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc40fea3c9d424a…

MALICIOUS

PDF

43.6 KB Created: 2020-11-06 12:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0d722c664a69e9a8c57e186448cd70f8 SHA-1: bfb372b9f99b3a2dfa99c2d79dda4be1f6e60047 SHA-256: 6cc40fea3c9d424a69e7df6006447ae4ba77790398c2e846813fb527ab18fe68
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a textbook title. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://traffine.ru/strik?keyword=manual+of+structural+kinesiology+20th+edition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8f49e7d71ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fa3596b1bd48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f872ee2978a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f8ab421c3c03.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/jinabom/42065586760.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/betty_crocker_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890a6a75-d188-4581-b0d6-ff5f0820b245/31763221213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58848c58-324a-44f0-b722-eab42917be0d/xitodivogosegoxekobov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03990205-1245-4279-9817-e0b52b78720c/49324313785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1db2894-7274-42c2-a33b-15eb481d2105/76299632876.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_off000069d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D6 5728 bytes
SHA-256: f757d382888c1e2ee1a102210fe155f932ce8264cd75e773881ab6d2c4d6e4f0
font_01_sfnt_off00007d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 10772 bytes
SHA-256: 4815e149324465ca3073e58c0860f4397af4be3ca55ad1a9d4ed7754b310ddb5

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