Malicious PDF — malware analysis report

Static analysis result for SHA-256 397e5212539204ee…

MALICIOUS

PDF

43.7 KB Created: 2020-08-29 14:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8286aa36665b0af9242bba53058466a5 SHA-1: fb210d57ab88d5ab786841935c7d55bfd4e3d888 SHA-256: 397e5212539204ee151efb17cccc0e058838cfedfef491046708ef031b63d34c
120 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at https://ttraff.ru/wix. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs hosted on static.usrfiles.com, suggesting a link farm or redirection scheme. The primary purpose appears to be directing users to potentially harmful external content.

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/wix?keyword=brainwashing+the+science+of+thought+control+summary
    • https://static.usrfiles.com/ugd/b8c837_68e07adc3cec48a5ac8e7386976720b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cc6f02fb8b14d88ac3c5a7bb30b2a08.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f09e834ede14f4287359d0c1aa2bbd8.pdf
    • https://static.usrfiles.com/ugd/b5472a_3d46fc6ad01c48409827707b3dc19c16.pdf
    • https://static.usrfiles.com/ugd/b8c837_d555d847c9024a99bd9a694c86e40bf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb8ef98c69349109e51ee513d3a988a.pdf
    • https://static.usrfiles.com/ugd/b8c837_87cbba97ed3043f890761bdf6991f9dd.pdf
    • https://static.usrfiles.com/ugd/d54300_07aea694ddc84fb7afafc305c4f2e49d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d969027c05e04a7fa4151f0be6228258.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc61679a3b074570bdf8b86de40afee0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b4b51566b8d4f72bc7ea6f85f414c3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_29ea5cf2411d42ceb38c36d8e5fa711b.pdf
    • https://static.usrfiles.com/ugd/95089d_cf18a68306dd4534b58a20fee0b33c32.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/40698334829.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/db_super_episode_75.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/guzugaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/vujidiso.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_off00006c87.bin
f0beabd07497e3ac79d6043c8b51902007b7949e54f02532d2bcb68157117649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 5536 bytes
font_01_sfnt_off00007f42.bin
78a36680ab721e2e373701d95b00390dfac4ecdbf70967f906c3335de1ec158b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 10056 bytes

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