Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9d775bd20305c2…

MALICIOUS

PDF

59.9 KB Created: 2020-11-26 01:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 543bcf347784c0ac2cc684b05abf54c8 SHA-1: 36126aa7d5bd1dba651aa846419b747f16586663 SHA-256: af9d775bd20305c2e02231a1398acd47929d2c5d40fa14f9b2778bda6f167bf1
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 'https://traffking.ru/strik?utm_term=riddell+mini+helmets+size'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or further malware delivery. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or trojan attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/strik?utm_term=riddell+mini+helmets+size In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fb76fc7ef17c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f9b704f75131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fb2521249578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f98ee7157947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8ea28a57e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5f98703d3da53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f98de6ea3b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fada92bea7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fac0a158ce3c.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/kavitokolezub/16742886278.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/79173746698.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/allen_chemistry_notes_for_neet.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/78084484797.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/andrew_jacksons_veto_message_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/13602647374.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_off0000af5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5A 4816 bytes
SHA-256: 496ee229294f45491e344e552c0064eedb810e6118002333b55cb6bcad8ba59e
font_01_sfnt_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 10276 bytes
SHA-256: 40e04ccaa08e4bf3d5e8f7204c1dcec89df44810b9eacda2dcfc07c60c3d77b8

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