Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c490f6b16c24c5…

MALICIOUS

PDF

78.1 KB Created: 2020-11-20 20:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3d931e1ea7cccccda7e249703fe3b4a0 SHA-1: d6f983855d1dfaa5b327edf684381480df450785 SHA-256: d7c490f6b16c24c54021f634d81ffac1c35cd785cf5d06e76d984b39db509ef0
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://traffine.ru/123?utm_term=race+matters+cornel+west+pdf+download+free+download'. 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. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=race+matters+cornel+west+pdf+download+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9650ed7c615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f9a04c220594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5f93b6967797e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f9dc67e972c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fad81748122b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_5fac4ee7bd1bf.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/48abc1e0-e7cf-44f6-9d78-48f2fa96e116/81697838452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef226de7-b309-4896-a2df-5ac7516a26d0/what_is_a_cordis_catheter.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/route_66_travel_through_the_bible_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e348e07-2aec-45b8-b839-457b0523fc07/153809956.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/solfege_worksheet_4_answer_key.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_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 5400 bytes
SHA-256: 95969b989cfe58df11ac3c838b91e7233eac9d09e79a533728f65d7c044a2471
font_01_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 10716 bytes
SHA-256: 756d553e9b276fdc9d0434ffba27ebc65f89ede7eedbfaf2777497c2a1583854

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