Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f844d8a5162ecc…

MALICIOUS

PDF

51.5 KB Created: 2020-10-05 00:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d10132b67e65aa3f9ec764417485136 SHA-1: ed1ad982dce9bc475a6ed1908018ceafdefce532 SHA-256: 74f844d8a5162eccd6c1603bfbd3592a3a164e4761c0042ca31f7e40810e3673
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with at least one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a link farm on disposable hosting further supports malicious intent. No scripts were extracted, and the document body is heavily obfuscated, but the link analysis strongly indicates a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=spiritual+leadership+blackaby In PDF document text
    • http://files.mythosfirehouse.com/uploads/1/3/2/6/132695829/molob.pdfIn PDF document text
    • http://files.bnfootball.com/uploads/1/3/1/8/131856225/titerumo-vafip-tezatobodiwuki-woridujodeboras.pdfIn PDF document text
    • http://rodinot.happydaycafe.ca/uploads/1/3/2/7/132712615/1955980.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/42524335409.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/46485501431.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/kuzire.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/ff4fe823-d4f7-4323-92fe-fd7e16efc91b/xukizaxiwepodibuvavarotit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1c9657-cf09-4665-86fb-9ede371ec116/87812358331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b00ba1a-9ce7-49f1-8d26-a12e0ff16d12/57334721249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c923c05f-8580-4995-a9db-0b89728e1d25/99796673789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05adee7-6c83-47d2-bbc5-9525d60b2376/59743096376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/93179438134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6821/2646/files/ronemebumejoxij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6569/6152/files/sams_club_lasagna_stuffed_shells_nutrition.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_off000089db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 5568 bytes
SHA-256: 106407267e138906bc922c24e51959ab617be7319277eb5337003924a7be3d73
font_01_sfnt_off00009cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC2 10696 bytes
SHA-256: efc66ee9838262bc474c8fa3c919cf9338183da888aa7061c9f3d0dc24bf5af0

Open this report in the interactive analyzer, or submit your own file for analysis.