Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fbfb8042686d65…

MALICIOUS

PDF

40.8 KB Created: 2020-09-01 07:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 617ac3a2e646bea6bbf5397b969400e4 SHA-1: 1dce73c4659a57127244155c203bea745d746d21 SHA-256: b4fbfb8042686d65e30d545d36c6f70fd284b8b370802f1522cf46264b531a43
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of external links to PDF files, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=ames+performance+center', is flagged as a known malicious redirector. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to host these links.

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=ames+performance+center
    • https://static.usrfiles.com/ugd/b5aed9_2e3aaf40ca9b48d68340c77dc1d10423.pdf
    • https://static.usrfiles.com/ugd/b0b521_04d7aade381148cca9a0f076611c82dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1ffb517261f4ccfa867406991f5cb14.pdf
    • https://static.usrfiles.com/ugd/599026_22f81ce64c0e42d9be6b59dd2141473c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c808b6b09c1e45648afa93b61cb4a8ea.pdf
    • https://static.usrfiles.com/ugd/078c79_988d1a8beaf04ab3b6d31cbc442958f6.pdf
    • https://static.usrfiles.com/ugd/fb5067_2764aace37bc4bc4b19cb4ef47d3f086.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_e8d87c6ea937436289cab3d3ca931b73.pdf
    • https://static.usrfiles.com/ugd/b52961_b40cfde4bf6d40ca93ef7ac120db605b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4456d4e8d39a47e0b54fa0663237473a.pdf
    • https://static.usrfiles.com/ugd/cafc24_2dcf3cb43931440e9ee0581fae6e78ca.pdf
    • https://static.usrfiles.com/ugd/6cfc61_ba8398bd32ee46c3b6f3d19e622a1040.pdf
    • https://static.usrfiles.com/ugd/6290de_481efa921acb4857a84ff85f622ba465.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_4c0ba93076b24809b165d9749eeeaf83.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_off00006340.bin
9fa28f65b2d12d6e8530a4ca68785de41c99836477590f564d954539c27ce33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5116 bytes
font_01_sfnt_off00007493.bin
f29b43cb3a2172e274dff496a136c79f811293124c8102d10317254768d757a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 10076 bytes

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