Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c8ab66f61ca342…

MALICIOUS

PDF

36.8 KB Created: 2020-10-30 09:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9f0e8ab3f7c9f14c44b57005aa375b87 SHA-1: 16785387d76373af572cdb2d68856c518e7a33b7 SHA-256: 65c8ab66f61ca342da0e2e56b377163a8fc6b1694e0af8a9c1c629989b2e9735
94 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/strik?keyword=ncaa+football+11+xbox+360, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body text, though partially obfuscated, contains references to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=ncaa+football+11+xbox+360 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f943484a67b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f90cab733ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f87ba2a8994b.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/5324547.pdfIn PDF document text
    • https://somanenor.weebly.com/uploads/1/3/4/4/134472611/1985176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7238/3904/files/29868999295.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/85013443662.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/ganogeniruwowuxuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4deff684-591e-4ad5-a9d3-79fc6f8fdb30/borges_and_i_frank_bidart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07749f77-590b-4889-b731-e41c2109f003/61169266411.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/98004615297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5502/8661/files/panasonic_eco_drive_inverter_washing_machine_manual.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_off00005139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5139 5292 bytes
SHA-256: 370b20ee28c49f97f59aacd0a49e53c4615afd23ab43faaabb3f7c2b03734ffc
font_01_sfnt_off0000635e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635E 10452 bytes
SHA-256: 4fc8b4a1731fe6a6764f88f1003763e6a79964af674ab3f28dc8dd43d0672652