Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfee8267d0a1ae8…

MALICIOUS

PDF

68.4 KB Created: 2020-11-24 09:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6a99ea84d088d9516153f25e97e69a6b SHA-1: bfa6f890b05ddcadc88315775337675bc6cddaa6 SHA-256: cdfee8267d0a1ae828ae2d51bc671f26ee756f87d3f6fb780450588368499796
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'ggtraff.ru'. This indicates the document's primary purpose is to redirect users to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirection often involves embedded JavaScript to facilitate the redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=unreal+engine+4+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5faaece84a3bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5fb2f7fdc49c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470228/normal_5fb25eb0c92c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fbc43cca4d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_5faf614922ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f8fee3682403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_5f9a49b2f0b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5f9f2b24a231f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5fb6d1cda0875.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/a02cbf5e-e6b6-4fab-929e-6962b414503c/lobalijabanejasawas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2c4459-f288-4998-a787-07a3ca4bf23f/como_hacer_la_goma_del_paint_mas_grande.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60b25a2-739b-4eb2-8b19-7a81b267d419/66619779463.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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 4956 bytes
SHA-256: 90432d44260ebc357ccf5559c9b55d38d94348ff87555607798be2fbba731f4c
font_01_sfnt_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 10692 bytes
SHA-256: 48feba270f05d14d2b4d25b3e184e2fd614805fd9a6889e7f2f27e666b95a62e

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