Malicious PDF — malware analysis report

Static analysis result for SHA-256 6758c26f735d5d6f…

MALICIOUS

PDF

63.6 KB Created: 2020-11-27 23:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d2a42c72cc96f8a8984f6bb2f430c30 SHA-1: 1b0ad50f105cfc0a14d03c1243ba07448e74e0d1 SHA-256: 6758c26f735d5d6fefacca120b7fe6e097c345816ec66c49d7d86767e234c5c3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, including a known malicious redirector at 'traffine.ru'. The heuristic firings indicate this PDF is part of a link farm designed to direct users to potentially malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ML classification suggest an attempt to exploit users via embedded links, likely leading to phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=tattoo+lettering+generator+app In PDF document text
    • https://gokimojesip.weebly.com/uploads/1/3/4/5/134595710/8371984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fb855dded526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f91c66d16b63.pdfIn PDF document text
    • https://juvipafas.weebly.com/uploads/1/3/4/5/134583250/jufowifusikuxir.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/vitugofemedesij.pdfIn PDF document text
    • https://vimikipemaw.weebly.com/uploads/1/3/4/3/134331773/girigigoxagitananiw.pdfIn PDF document text
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/zujitaxirekedos_deduxawara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8a9f00ea192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_5fa54fd3b18fc.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/nuxod-basidiwibalaj-vavalokofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5f9d053579876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f887e2385683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_5fbc0f17f1bf7.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/83353ddf-312f-43ca-a49a-805aa2b6e20a/fiseruwoketomezid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a6b89c-7e89-4dce-8575-4a55a9d63032/sogawufaler.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_off0000bdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFA 4756 bytes
SHA-256: 70cda0378bb46bc3c94542a92e51fa8e16d54bac1a132e83a597fea7337b22f2
font_01_sfnt_off0000ce38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 10404 bytes
SHA-256: 1821344cf7fffb71caadbdfcf18688f0833096bb8b079785220665a9f809a496

Open this report in the interactive analyzer, or submit your own file for analysis.