Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4a280ef39d607c…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 11:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14085f7934b0989cd200b59a30f65ac0 SHA-1: c93a6525e1e6f6c22dc7348b344d9ed70948fd2b SHA-256: fc4a280ef39d607cfda5a07e7fd64c96bd0fd5b7c856ca7b93463e3aad41d995
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cathedral game rules pdf' and the malicious URL, suggesting a lure. The presence of a link farm further indicates an attempt to distribute malicious content or traffic. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ttraff.ru/pify?keyword=cathedral+game+rules+pdf In PDF document text
    • http://files.heatherhuangstudio.com/uploads/1/3/0/8/130813409/8cb9a.pdfIn PDF document text
    • http://files.tampabaymodelrailroadclub.com/uploads/1/3/1/4/131409498/e8e11df305c5fd.pdfIn PDF document text
    • http://files.disdigistamps.com/uploads/1/3/1/3/131384306/fisebal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/mitetosafuwom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/9333336538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/rakanodavakasitolinun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/45542038525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/24908119840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/nevatesujerugigibaxexelig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/dorujuwedexezip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/gajilupojaguwuxivazev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/48347485594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/43340046848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/61020927101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.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 3

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_off00006633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6633 5360 bytes
SHA-256: 188aab9cfba1ecd973ee67eefbc76705dd9dbfc1154e567da8922da04a779065
font_01_sfnt_off0000783f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783F 14756 bytes
SHA-256: 544e298e4aebe4efe6cbca9069e43f9f4d207b2302fa1780bacba0c06fbc9ce2

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