Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2b50edc05f2d3c…

MALICIOUS

PDF

74.0 KB Created: 2020-12-16 23:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e77633c81a8829d4a6d362e06f403c05 SHA-1: 6c4b7669a0bba629156a3358e6c9cda1b4ded3a8 SHA-256: cf2b50edc05f2d3cb23e84b662f17e93bef280bfcfecc658ba73a6bf6672a011
154 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 'ggtraff.ru'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=south+windsor+high+school+honor+roll In PDF document text
    • https://rajulotopeza.weebly.com/uploads/1/3/4/6/134665566/3740177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f92aa98e4710.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/8771409.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/d755eafe22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5fb5f2e047db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_5fa729ad58b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f8ca0d31cb4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2ac18a3bf4b14abb478a5/t/5fc7dc492431962c2dc5dcfb/1606933579436/valkyrie_profile_lenneth_official_strategy_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1651bc89e1c4b8fc1e357/t/5fc9fee8887b444c615ae837/1607073512990/katigarafebugobidaxo.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_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 5188 bytes
SHA-256: d6c9288d5d37fe98eb522092d89b1d5f516f435a9a07036fb7656aac7fee7ead
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 10580 bytes
SHA-256: 9f8fd0b0839456adc4a9758fe1e90b565f3694a4d60dc96ae68c5926a206e497