Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c60cb0a91c27e2…

MALICIOUS

PDF

77.4 KB Created: 2021-01-14 09:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bbb9a02c4d7a3b1e7fbeb0028825520b SHA-1: 894b55379d55bd563cdddf340e6f202a178987b4 SHA-256: 17c60cb0a91c27e2d07f11f006ed4c397d1d453061fcd8847450648cfbf235cb
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 'https://gettraff.ru/123?utm_term=ark+drop+levels'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery. The document body is heavily obfuscated and unreadable.

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://gettraff.ru/123?utm_term=ark+drop+levels In PDF document text
    • https://site-1171990.mozfiles.com/files/1171990/snapping_turtle_baby_size.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/79209673154.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fcf344fd7092.pdfIn PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/97802009064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380229/normal_5ff9d7bd76192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f98d7f63889d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fc4e060b279d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5fc9d62dc76f7.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/wajixulukojaged.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_5fadce927ba89.pdfIn PDF document text
    • https://site-1168081.mozfiles.com/files/1168081/knowledge_is_power_know_your_meme.pdfIn PDF document text
    • https://site-1180367.mozfiles.com/files/1180367/21262833820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fcbfab24d2d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5ffed22d4f48b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_5fb4f25ad807f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 4856 bytes
SHA-256: d5b650e3ccf332de30e1534cf901380a446ebc4c919e3a7adbe9654091f990b1
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10900 bytes
SHA-256: f9eee9dfbd8e4745bed8f761053c8cc9d25ab6616f9e75c944388e909725ad05

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