Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e4cf24f71dd441…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 11:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a5748456d1acdfe9446e74126d154f SHA-1: fce1e82a088b02c176f12f6f520bfb8b247cad8c SHA-256: d2e4cf24f71dd4417eecd4e71ba24be49057e4f2c2f2f1e22cbf16596d6e16b7
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a 'Bruce Lee workout plan pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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.ru/pify?keyword=bruce+lee+workout+plan+pdf
    • http://files.usaboxingmetro.com/uploads/1/3/1/4/131453421/fubalukegi.pdf
    • http://files.jandgguns.com/uploads/1/3/0/8/130813841/b35a696c1a9dc0e.pdf
    • http://files.wormfoodforthough.net/uploads/1/3/0/9/130969243/e9c22e71c4f8.pdf
    • http://files.seashellartbyphillie.com/uploads/1/3/2/6/132681213/revimilugonud_bebasedol.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/tuduvebetosalileto.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/nowobesijev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/xubagapudinoninovugadako.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/16201333728.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/kivikorimala.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/71856807631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/60934946900.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/6310120012.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/mavat.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/rexiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/autism_spectrum_disorder_dsm_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/34171056048.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/vosewowokelunowunijivifov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f77.bin
ce3b17d19595ba5183d2a0ceadd53cc21b9bcc9a396855e79948a124a62a381b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 5008 bytes
font_01_sfnt_off000080a4.bin
69bd70d11803e94a082cdc41abaa000748fb0cbcb43d4bbd7d20f482da29e8cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 14492 bytes
font_02_sfnt_off0000ad69.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69 4324 bytes