Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bec289b55594bf1…

MALICIOUS

PDF

61.2 KB Created: 2020-12-20 14:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39c98b13db5b2cc41b080d290f47cc5d SHA-1: 131377a1b3dc05fe5829b974486fda93d9511cd4 SHA-256: 2bec289b55594bf10e671a1a6395b3569a6ed05882c5de099936ff5a11b371dd
214 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains text related to a 'Cyberpunk 2020 core rulebook download', suggesting a lure. The presence of numerous embedded URLs, many pointing to benign Squarespace domains but one critical malicious redirector, indicates an attempt to direct users to harmful content. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=cyberpunk+2020+core+rulebook+download
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/b046704.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5db78a5bc066edfc78c8f/t/5fc8214692e74531f3bf34fb/1606951240779/ximalegegugefuvida.pdf
    • https://static1.squarespace.com/static/5fdc81a80526ad1a5999a26b/t/5fdcf6b944709663001c9e1d/1608316601630/vinulopetitoneweta.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0a7e3c02f22b9dd47ca6/1606290047673/tixilamufiro.pdf
    • https://s3.amazonaws.com/bagisi/home_language_definition.pdf
    • https://s3.amazonaws.com/didowugorokirug/47263970323.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/uc_browser_online_installer.pdf
    • https://s3.amazonaws.com/rejiner/great_writing_1_answer_key_4th_edition.pdf
    • https://s3.amazonaws.com/zomuzigo/gawekasagijam.pdf
    • https://s3.amazonaws.com/wunupalezozerud/93437253608.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b281.bin
375a82dd3b193478bd5d2327ac68ad25988a5de96611127d2ee2ff448bd818e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB281 5464 bytes
font_01_sfnt_off0000c536.bin
0e2fe49cf7b83ac66a5292815d3c583b58f6e07a3b509108459dc1ded86a8bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 10232 bytes