Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5172c2457bc0779…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 17:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40aa6838fcf4d557a52a10b94c83a81d SHA-1: 5180db29e398cbb2f631ddbbd0ac06cc48ae136a SHA-256: b5172c2457bc0779d52f2c0668c9d3895b06c890b6b5869c774cdb2ba5a457dd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=cabana+design+system+free'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into visiting a potentially harmful site. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious 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.com/wix?keyword=cabana+design+system+free
    • https://static.usrfiles.com/ugd/4dd980_51ee2609a5f3468a90bc2f2332473cc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4509acb56e04908976b8183ea8eabd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4d4ae52d7941bdb4a5f76737f27e19.pdf
    • https://static.usrfiles.com/ugd/24853a_a0358bc6e76d4fd3b0d64b084d316256.pdf
    • https://static.usrfiles.com/ugd/2c608b_14a49f055a69454dbd1eb4e200f09559.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2ba7c7dd6148fb955195fcd3266268.pdf
    • https://static.usrfiles.com/ugd/2813e2_1d69794021b34814b607202cfce2317d.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_ce1f63a0b53e453d9e9ddc8ed117974d.pdf
    • https://static.usrfiles.com/ugd/f09a9d_b32a9ed73b4e4a9c8ab269b574c78246.pdf
    • https://static.usrfiles.com/ugd/87fdc7_bd0ca00efe774248bab860ed26d81f37.pdf
    • https://static.usrfiles.com/ugd/b8c837_79d18a12e5bf4706bb62bc5982b6810e.pdf
    • https://static.usrfiles.com/ugd/4dd980_d813e4f0b8314fbc99759e9181e2dc62.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_off00005f3e.bin
0855380b5922887e7de06d12df15d8d98edf7905406dbea3df070b9afe684dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 5344 bytes
font_01_sfnt_off00007156.bin
acc27ab547a59677c6645d960a59a020827807ad9bedf07dc93995a515b9eeed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7156 10416 bytes

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