Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd7cd8f57f23de1…

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 17:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31842d5f93504e968f71647f2c7cd1f SHA-1: 79de0cc0ff783d301b975821abd726de99f92096 SHA-256: 3bd7cd8f57f23de1200e7400a02cec057cb96bc7da778227d25be17e28a79c70
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and appears to be a lure. The presence of a PDF link farm heuristic further suggests a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/wix?keyword=paseo+50+millas+en+20+horas
    • https://cdn.shopify.com/s/files/1/0439/3294/2504/files/formal_envelope_addressing.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/64195542069.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/fluorspar_market_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/fefepalewojopumelabavu.pdf
    • https://cdn.shopify.com/s/files/1/0457/3233/1686/files/c._b._s._c_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/27582405220.pdf
    • https://cdn.shopify.com/s/files/1/0465/3052/7382/files/minecraft_gratis_pc_ultima_versao.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/94152026003.pdf
    • https://static.usrfiles.com/ugd/b8c837_d771a117df0c467e8870d4fd291b8aa6.pdf
    • https://static.usrfiles.com/ugd/b8c837_23de9b25a7244af8b20cabae8e05d6d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_77c4971fca9f41638db2f3f9bb6d221b.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/sfpe_engineering_guide_to_fire_risk_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/joforasito.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/xasakuzilu.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_off00007852.bin
3596f00d1c6287a124695fb7e08ed3388b2978cb86aad7826efc0ba5f99f7aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 5324 bytes
font_01_sfnt_off00008a3d.bin
b9e91e0fc04ce3492e599d6629b32da454bab0f46ce43b60f07b625ac2aa0499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 11600 bytes

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