Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1d560b4ed66e82…

MALICIOUS

PDF

73.2 KB Created: 2020-12-11 17:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c8405f8f21a03a99065deacb4b86760b SHA-1: bfeba4dc152aacd7c8c7e19ee09fcb97b2fbd2e3 SHA-256: ea1d560b4ed66e8233d622082153b85951ab1cc61eb9ffa46119bbec695b513b
214 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 'cctraff.ru', disguised with a lure related to 'Battlefront 2 classic multiplayer mods'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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?utm_term=battlefront+2+classic+multiplayer+mods In PDF document text
    • https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/5a8f52f4f.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/damizokivovi.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/sakaburepagase/43735454606.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/vototemalupepifi.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/vadodaxobusawoxoxomalaxen.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/rampton_hospital_cqc_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/jerusalem_canticos_vocal_playback.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/merge_several_excel_worksheets_into_one.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/mojojajumofefilipam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 5584 bytes
SHA-256: 7b70471a641cfe314fc29c61f15241f11b1cc7819f8716dc0f3b88265cef2107
font_01_sfnt_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 10736 bytes
SHA-256: b6609413f092cb62078e70dd3f0e19b5c9c567e2b52993ae4d0d3e104376b355

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