Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45735cee17394fa…

MALICIOUS

PDF

46.6 KB Created: 2020-08-04 09:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2a23b111d52e212e8266244da4ef0e SHA-1: 08111976174d1736972a7d71164f7498592447c7 SHA-256: b45735cee17394faf33be127417e89bd70e4beafe1a0a72abded25c454d660a2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=epileptic+seizure+pdf', which is presented as an 'epileptic seizure pdf'. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the ultimate malicious destination. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=epileptic+seizure+pdf
    • http://files.aspirerta.org/uploads/1/3/1/3/131380889/pinevepodepe_rogibazemuvi.pdf
    • http://files.ruralactioninternational.com/uploads/1/3/2/7/132740620/vupese_fawabuniremakar_kukexiwafenedos_mamajubuk.pdf
    • http://files.whiskeygoddess.com/uploads/1/3/1/1/131164275/2164596.pdf
    • http://files.rshawillustrations.com/uploads/1/3/1/4/131437378/nefox_vogewifabuxed_jilemixitogamom.pdf
    • http://files.susiegrindey.co.uk/uploads/1/3/1/4/131408256/82314.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/gadobilabejufefovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/pizufibefenipefuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/forge_minecraft_1._14.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/85574021936.pdf
    • https://cdn.shopify.com/s/files/1/0431/4516/7008/files/hampton_bay_outdoor_lighting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/vadefudiwokepem.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/zufur.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/wirikefomarinabiruw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/54047504471.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/wuxajovarib.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/ai_for_game_developers.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_off0000789e.bin
dfb8f297dc8e2da3c23bdb1fc732add1f53e670c56c722475b29d7b56afb2d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 4948 bytes
font_01_sfnt_off00008990.bin
36c9181830496decec07c40acd36875c451236ffda7f5f9cf09e8641f057c53b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8990 10596 bytes

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