Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46edf1de2da8ff8…

MALICIOUS

PDF

137.9 KB Created: 2020-12-23 18:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 26f3b783e5d45ad026dbeed010fcea8f SHA-1: cd0f5245f1e44dce4095cf5858531d3c512376c2 SHA-256: f46edf1de2da8ff8cf4aa023c2dc68e5cf1293d17649bb0176b4b4a60ae188d1
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'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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=salt+and+sanctuary+armor+mite In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fa7eac93be31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_5fc7709da80aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f9750dc82861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fa5dda175579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fc4bb4c769ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f94ede7bd753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446287/normal_5fcb8ea64a704.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/bc26ce68-2f00-447a-93e9-3b8f287d43e9/audio_technica_atr2100_vs_atr2500.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/bass_clef_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e7fff5-4b2a-4d63-961d-041ca3091d92/jeleliraweketaru.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/error_validating_access_token_facebook_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/apple_wallet_like_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/buwiwazunuduwagisop.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/suretyship_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/tiwaruxizepunajobujupas.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/6585296196.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_off0001e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2C0 5292 bytes
SHA-256: f0a9950e6294c6c7a523822d06852f399bdf8ea484468c37ca3950b86ada053c
font_01_sfnt_off0001f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4AB 11204 bytes
SHA-256: d218be6ccc27dfd84b46fe17a608833052231abc15474f7d1291d762e30fc5fa

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