Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99812e9e6aa8156…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 19:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9594c8bd4da180409119c7cd703d6a81 SHA-1: b5d63cc550c1576b8c823ed2d6720bbde5dafd0e SHA-256: d99812e9e6aa815622e97c5f271a6f008bd62e982422ddc7533653d84cd65d99
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests the PDF's primary purpose is to lure the user to the malicious redirector, which likely serves as a gateway to a phishing page or malware download. No scripts were extracted from this sample.

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=you+pull+auto+parts+mn
    • https://static.usrfiles.com/ugd/b8c837_e7163694d3c2420f8f09a255e1cdfa80.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bcff15cfa1c4370b1d950ab64693aab.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff482b99a2044902bd9b5e8ca62e7d65.pdf
    • https://static.usrfiles.com/ugd/badafb_296b4e61186a46ab8bd1133760b22b98.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b583fcf5f8a4e5b88a87041d508d6a0.pdf
    • https://static.usrfiles.com/ugd/b42fd6_87242de598a449f4a53e0649d33c79fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_010d7a20908c40c0b5541ef180ae64c3.pdf
    • https://static.usrfiles.com/ugd/3be3a7_deb27a00ea474668a861230493aed31a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1388fc8b3d64c2992cb931b9f52fd4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f190770c6c074c80a9063f0f03d98476.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_58caaaec99804492b8153230bd2c4d42.pdf
    • https://static.usrfiles.com/ugd/bf0735_7d7be6ce511b4da895932b126c52a145.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_04323705549d4650b5419aa46c86d59f.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_off00005f41.bin
9d0957b46a67caf73db0277bd82a8986ee20388208f4505ce0f840f12e18d53e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 4928 bytes
font_01_sfnt_off00006fe9.bin
49cc8286fdba4324d83c5f8080b0e081b3ebd5d87c6b2809271d80cd5e3c2c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 10292 bytes

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