Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c45312213fd3a5…

MALICIOUS

PDF

66.5 KB Created: 2020-12-20 07:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 13fa3acc45260cb5a15e1e435ac018f8 SHA-1: 3a3b7de6f447a1a3205b6c28629751bf3891452d SHA-256: 68c45312213fd3a511252936d250a321a4bff1069946af1bdb48ea1665a09714
254 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically 'https://cctraff.ru/strik?utm_term=5e+halfling+fighter', which is flagged as malicious. It also hosts a large number of external PDF links, many pointing to S3 buckets, suggesting a link farm or SEO abuse tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=5e+halfling+fighter In PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/121f2e57d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_5fbfe0a7ca897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5fde7750f3085.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/514ff4a4d.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/gozilum/gitegewexexewisogezinob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12710abaecd331823d431/t/5fc2a567f8cdb769c639d766/1606591847963/23940391964.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/27904561569.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/novation_launchkey_mini_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/xifabanugiget.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/97802660331.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe26f8f3de5e49b52db0ba/1606297337088/29978522767.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_off0000c853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC853 4880 bytes
SHA-256: df4f54bb8e3f1cae5dc4e2d866a8155d84df4e6aaa481f61d1f83c14691fb178
font_01_sfnt_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 10884 bytes
SHA-256: 829b2f945957aad1df7fcd62955a17849ffa387d00826f40935d236a5df1ac2f