Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a10ea70a0176bb…

MALICIOUS

PDF

81.4 KB Created: 2020-11-12 21:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d9f6d05073e961cad4ad0d541d0959e2 SHA-1: 78e94c6c4883cbcddfb4d4735b21012a2d959ad4 SHA-256: 55a10ea70a0176bbedc8f2c149cf10d50d4f2495a20521890a2b3e10832c0d68
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/123?utm_term=2001+f150+headlights'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/123?utm_term=2001+f150+headlights In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fa849cd286bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fa76ec25af06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_5fa621d6d76cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8763d0ccf5f.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/22435343-c4f4-4545-b51e-705db8147313/droites_remarquables_triangle_rectangle.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/saudi_railways_ticket_booking.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/49170829786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0a9140-5491-47e9-a157-6f9a25d949a8/wupagavak.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/kumaronit.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_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 5428 bytes
SHA-256: d475740c0e8aa3bab2224c9f3531115474896d3f62ad7409da875ab7f6a06b9e
font_01_sfnt_off0001156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156A 10436 bytes
SHA-256: ff4b0d07cd18b9705a61fc5322a368ab9c53e70b231e448310ed254d265a1412