Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54a8c9da3fc7b96…

MALICIOUS

PDF

72.9 KB Created: 2020-12-31 18:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c9ea3157f24f6d948f100ef1d7c8af2 SHA-1: 79bdea318cacfe2274f84b193bd5fd36db191047 SHA-256: c54a8c9da3fc7b96dd4a82e08e83c8601afe95b968f28b9ae0d8dadcc81bfb69
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'. The embedded URL is likely used to redirect the user to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=spiritfarer+review+kotaku In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5fd74ef328730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fa31f8502030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476947/normal_5fca280d0ae73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fd8d8df08785.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/hb6hjgd/6461238146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414688/normal_5fc7d43f221a8.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/gogunabones/biography_template_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5a43c9-c9d5-4545-8418-c98b099dfc49/civil_war_review_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/query_google_sheets_reference_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/business_management_ib_oxford.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_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 5004 bytes
SHA-256: 2d1e6d25b980be6e26f60d1a06c4de6d9a5dbf2fbca0d6df82c30b4f4afce3e1
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 10248 bytes
SHA-256: 9874797c9dfc2d5f6c1e71fa447a75c1ecb92478a4d8df220aaaffdb29e94b5d