Malicious PDF — malware analysis report

Static analysis result for SHA-256 d779ba61c1ce3de6…

MALICIOUS

PDF

70.2 KB Created: 2021-01-04 01:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 781c434e4bbf5ea9f3ba654b87a7a299 SHA-1: da5c4a864d71689331bf13f9a2ec0044ed60c03f SHA-256: d779ba61c1ce3de6ebb51d5ccd2bfde2c524c934d429872ff96f7cfccf62240a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, with the primary malicious URL being https://trafffi.ru/123?utm_term=mill+lathe+combo+with+dro. ClamAV and ML classifiers also identified this file as malicious, specifically a phishing trojan. The presence of embedded URLs and the link farm heuristic strongly suggest an attempt to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=mill+lathe+combo+with+dro PDF link annotation
    • https://cdn.sqhk.co/fitamorigob/bhgibhc/amazon_free_shipping_on_everything.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fd9e606d7c16.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/jafibWo/38209479470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_5fe690aa62d94.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/wozelon.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/IigVH1V/tomorrows_race_cards_at_york.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5fdb2b8501f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5faf96241a2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/hjb7hhn/master_bow_super_stickman_archero_fight.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/a5806fa0-0a7e-4771-9b97-b36545bc73f6/10521940167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38987581-78af-44a6-9c29-2074bc5b2df9/32837164455.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_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5236 bytes
SHA-256: 18ac7de471523082f30b391a0b6d5c5dbaf14c73b453a9d6be4fc72236a9f34a
font_01_sfnt_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 11004 bytes
SHA-256: b2f33b96fa7cae9b2235afd9e94fef98f63c8d0780f40f8f9a4ac2ecd874b77d

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