Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cf1a85aaf7668c…

MALICIOUS

PDF

48.7 KB Created: 2020-08-03 03:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b63f67182c1c15ed7e94ef6eab25337 SHA-1: bbc4c036cd8e0e80768a67656e1656f03caa3fd9 SHA-256: c6cf1a85aaf7668c7dc36723a3b334ab41cfe42fc4d998f99eebcb79cca16d9c
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL that appears to be part of a link farm. The document body text, though heavily obfuscated, contains references to 'autocad electrical training book pdf' and includes the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links further supports the link farm heuristic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=autocad+electrical+training+book+pdf In PDF document text
    • http://files.titaniumforcecheer.com/uploads/1/3/2/7/132710704/d4fb68c3b.pdfIn PDF document text
    • http://files.bigfootyarn.com/uploads/1/3/1/8/131857383/xusovetagi-pasitinebofe-nogufakudapinod.pdfIn PDF document text
    • http://files.artboxvirginia.com/uploads/1/3/2/6/132695363/7125889.pdfIn PDF document text
    • http://files.gcctampa.org/uploads/1/3/0/8/130874231/423a1f27d6e.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/1/0435/7960/5147/files/24858991287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/44958592298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/gibosebotutibal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/11305338777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/lebibig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/xigodafuvanuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/komakasekepurupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/pokitijof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/8015226371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/java_coin_flip.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 2

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_off00008062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 5340 bytes
SHA-256: 9a61b450b994715fb6babc29e4064664c8ffe20cb9cdb1bf6f09ba694838a6ee
font_01_sfnt_off0000929a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 10308 bytes
SHA-256: 631c60ebea9fb7b9f61193da0172d3f22a308aa13f77c11c9ff4fbe207d028b1

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