Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cf25217ca3eafb…

MALICIOUS

PDF

66.9 KB Created: 2021-01-04 10:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1396dcc29fe80ca66d6b2fab98ddd8b8 SHA-1: 7f87b099913f55fb433d267d988419282a289646 SHA-256: 73cf25217ca3eafb4f8ac92a33c8d56012cb91a36342d2c3c9287730f66a5693
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 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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://traffking.ru/123?utm_term=warner+stained+glass+hours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8a4792a692e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463300/normal_5fb258f920943.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/hhhdjY9/warthog_red_vs_blue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fbf58c97dc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5fa518012e0d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413719/normal_5fc892ff26131.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/ghdijjb/73981574305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fd73815a3dde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5fc60a70f03d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f9c0dac896f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8ac9d477359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_5faa1d33058b5.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/ijtzifG/wuliriwibazugujug.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/4c7c6c59-f081-4272-b749-518e414b51ca/99061195309.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_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 5100 bytes
SHA-256: 712660f67845f4008df82775728a710ecfb8962a393dc0ba0a1775f4bd254db9
font_01_sfnt_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 10512 bytes
SHA-256: 87472e3ec3137bfa08cf864f8ed30073fe48c8d9c722d8bfaa50f8a79591c53f

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