Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bed3ae5848b1f5a…

MALICIOUS

PDF

49.2 KB Created: 2020-11-02 17:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bfa6acdba6e8c435243de76983b09294 SHA-1: 07142fc6407d3e997635a6b263966f30b348ff7b SHA-256: 9bed3ae5848b1f5abd4c0c551210ce9ee741912c287191ac93e0e73ad0e1819c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://cctraff.ru/strik?keyword=what+you+eat+is+your+business+pdf, is identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates the presence of numerous external PDF links, suggesting a link farm designed to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what+you+eat+is+your+business+pdf In PDF document text
    • https://gigewabiwijezu.weebly.com/uploads/1/3/4/5/134576475/62156.pdfIn PDF document text
    • https://valekide.weebly.com/uploads/1/3/4/5/134584612/dffb81.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/559e6419.pdfIn PDF document text
    • https://devigumekumowir.weebly.com/uploads/1/3/4/3/134394761/9138000.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/656323.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/kagedatabujo/vixiresirojumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5fa7b1-2da3-4e03-b8e2-bbc438993a5f/53433594297.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/sojobiperegevotuwivomibaz.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/6007650798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4546ce3-a9f5-49ab-8564-895e0c936404/91814602526.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/67177826857.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/3855960059.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/concept_of_economic_growth_and_development.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_off00007e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5B 5352 bytes
SHA-256: 6e1555e709440db012c9c3cc16d92d209ea3ff120600b55f54cffa7da95f6762
font_01_sfnt_off0000909a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909A 11816 bytes
SHA-256: 04a86c8ca088dbbbe6fb68b08919493c3a84db970d23a66c327551e636a46afe

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