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)
MD5: 5b63f67182c1c15ed7e94ef6eab25337 SHA-1: bbc4c036cd8e0e80768a67656e1656f03caa3fd9 SHA-256: c6cf1a85aaf7668c7dc36723a3b334ab41cfe42fc4d998f99eebcb79cca16d9c
160 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.

Heuristics 4

  • 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.
  • 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
  • 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
    • http://files.titaniumforcecheer.com/uploads/1/3/2/7/132710704/d4fb68c3b.pdf
    • http://files.bigfootyarn.com/uploads/1/3/1/8/131857383/xusovetagi-pasitinebofe-nogufakudapinod.pdf
    • http://files.artboxvirginia.com/uploads/1/3/2/6/132695363/7125889.pdf
    • http://files.gcctampa.org/uploads/1/3/0/8/130874231/423a1f27d6e.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/24858991287.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/44958592298.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/gibosebotutibal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/11305338777.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/lebibig.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/xigodafuvanuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/komakasekepurupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/pokitijof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/8015226371.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/java_coin_flip.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008062.bin
9a61b450b994715fb6babc29e4064664c8ffe20cb9cdb1bf6f09ba694838a6ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 5340 bytes
font_01_sfnt_off0000929a.bin
631c60ebea9fb7b9f61193da0172d3f22a308aa13f77c11c9ff4fbe207d028b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 10308 bytes