Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafbc13188afea17…

MALICIOUS

PDF

105.7 KB Created: 2020-11-17 23:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b37e7451a0fd614c09c82a549dccfe60 SHA-1: 9c8a4e0925053a914e2e9940ecfa01c5adbdca47 SHA-256: dafbc13188afea176ecb8b2f4547a6c30138037874b2b1dac2d160297f3f3d79
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=pitch+perfect+script'. ML classification also strongly indicates maliciousness. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=pitch+perfect+script In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f884c51722a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f9a3c2d85e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_5fabd6868a26d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f8d9606b5a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa8f85d957c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8cbc71a526a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fb3019fb5827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f92ee0d7ebe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f9c20b0d1aff.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/xetasif/3328836466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c807c8d-c576-4d3f-abab-a1adee61dbbf/kotuguj.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_off000163ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163EF 4864 bytes
SHA-256: c0a272f0d102ff69ed5529785f530822734dc9f7dd94a0b35c6ad16132479dd4
font_01_sfnt_off0001747f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1747F 11064 bytes
SHA-256: 6fce488c095e3d2aef1083f54870830651e556e6f255605ee0d49d698b6c190c