Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6383faa69936835…

MALICIOUS

PDF

66.6 KB Created: 2020-11-10 18:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2efb5fab878cd4b81514c4baf0260101 SHA-1: 179dc6db1bc8e817ac025c7c9d2d571a337e8395 SHA-256: c6383faa699368355d2cf681f4e9bc22a24040821a66e835bb9c3567822397e9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'traffmen.ru', which is associated with malicious redirector activity. While no scripts were explicitly extracted, the PDF structure and the malicious URL indicate an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?keyword=demonstrate+synonym+thesaurus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5faabae81d607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f9ea87d8ce3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f8ea260a2210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87ce9a6a13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f9b1ac3742e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fa3404432144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fa2015c8eb79.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/tojabixefova/how_to_disassemble_a_keurig_2.0_for_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/linear_programming_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa1aa76-a31a-4ad5-9c35-fafc57af67b6/5279708596.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/1947_ge_refrigerator_vintage_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53becf7d-2e86-45e3-a55f-d786437aaa7d/94076301644.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/damiximexe.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_off0000ca25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA25 4996 bytes
SHA-256: a03981dc293d908f8b7fd318234ca120fe0fa17fb99703554c233f20db18a4e0
font_01_sfnt_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 10184 bytes
SHA-256: af4d9d2a6270962e6e272ebb5bbed45a579656d73d9cd788f9f9cb12e5e0dd8d

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