Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e5ec9c6b1c8ee4…

MALICIOUS

PDF

60.7 KB Created: 2020-08-30 04:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c233b2dd328dc607eaa5b7a00ea7723c SHA-1: 769ea0d260eb0c5e3a84f1325208419ccc16cfe5 SHA-256: c9e5ec9c6b1c8ee40c9aca23780fe6c38f84700014e6ff0157caaf53b8f1de7c
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=book+of+the+five+rings', which is also listed as a malicious redirector. The presence of numerous links to static.usrfiles.com suggests a link farm or SEO manipulation tactic.

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.com/wix?keyword=book+of+the+five+rings
    • https://static.usrfiles.com/ugd/f09a9d_1e385cf9c1db4a7a9974089029c72561.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff2533c4c3f4d0db9f272b2c5c62050.pdf
    • https://static.usrfiles.com/ugd/b8c837_72020fa966ed421cae4e09872c55cac4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa95854cc88841c696f29247252cd6fa.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_ffe33ccfaa584a3882cb96deef114c1f.pdf
    • https://static.usrfiles.com/ugd/f0f215_11beb830cd6246b89eeb4eedec6478d0.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_9932266eb03b4deaa42f0d28c9bb53bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_13069e5ea59e426e91a94cabcaab5760.pdf
    • https://static.usrfiles.com/ugd/b8c837_303bb6cf191b4b74b05684736a4d1df5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cc12c43e58c4190a9016b0b856f756d.pdf
    • https://static.usrfiles.com/ugd/b8c837_965c8c0373814048ad8d9eb9b11ac205.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/55366289564.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/45306858872.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/3615498408.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_off0000a4a6.bin
756d0e9f37e349d9929c4deaa857d72f6f7fd9f39365ddfc1ce06142b60c95b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A6 3504 bytes
font_01_sfnt_off0000b101.bin
f71e8a00b2ba1cc56fc6c5d4c5dad57963db3ef261f3aff2a29fa52b9f840b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB101 4960 bytes
font_02_sfnt_off0000c1ed.bin
1693d4c5144a4bb6ad51964ed1eee2e7cdc5abd9671bd12aa728127cef86ed93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1ED 10684 bytes

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