Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbc0d8d67ab5a6e…

MALICIOUS

PDF

33.2 KB Created: 2020-09-09 06:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ce8b6870c1443699676a8550eb2f327 SHA-1: 1e7ac7cf709cf60d0cc7efde9015fc02c623be02 SHA-256: 9bbc0d8d67ab5a6eb15985f5ccbc6d16a805e47ff177a2707e8fffc5122df223
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. One of the primary links points to 'ttraff.me', a known malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other PDF links, reinforcing the link farm detection. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=ame+engage+answers
    • https://static.usrfiles.com/ugd/289c5e_f57ec29dd0e14bf385ed19ce5c20271b.pdf
    • https://static.usrfiles.com/ugd/b6aaa0_bb41e84322b44924b7311eb3d4cba45c.pdf
    • https://static.usrfiles.com/ugd/ca32a8_4f5729ae70954782827193c178fa823e.pdf
    • https://static.usrfiles.com/ugd/338562_d6c6f92afdfc4a018613ca0f3ddb5a06.pdf
    • https://static.usrfiles.com/ugd/24deb6_a8558099b22448228d277b0779a34f2e.pdf
    • https://static.usrfiles.com/ugd/b9801a_1162c983ade34fb99e6874619c32dcad.pdf
    • https://static.usrfiles.com/ugd/49488e_409b146688494ed3b794f126e655d6c9.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/44264879562.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/lego_movie_videogame_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0445/3485/7892/files/attention_seeking_adam_phillips.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/14419263620.pdf
    • https://static.usrfiles.com/ugd/72ed28_fc03a880e6094f2593a285749338b40b.pdf
    • https://static.usrfiles.com/ugd/432b07_8873201bcbb2444b9030702615203086.pdf
    • https://static.usrfiles.com/ugd/89c6ad_c5224fe4cb1a4d71aead113251d4834e.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_off000044fa.bin
70ba137b287bfa477c027a132a9b230d02bd2d3b10a61c350765f7acdf499976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44FA 5056 bytes
font_01_sfnt_off00005627.bin
2094ba864a5f38d460f9d67372c4dc24834843ad022728846d801931c65959ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5627 10052 bytes

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