Malicious PDF — malware analysis report

Static analysis result for SHA-256 970e7d11a5d72829…

MALICIOUS

PDF

55.4 KB Created: 2020-09-01 15:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fb8578e68e2d42fd2c4f07ecddbe0a1 SHA-1: 56d5414aa5e4cb3b412400f9df4bf9c4a37e31b7 SHA-256: 970e7d11a5d728291c6f03c9fe79b4ee37f171356f511ddc5014276f1b5463ac
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used to create SEO link farms for malicious purposes. One of these links, 'https://ttraff.link/wix?keyword=thousand+miles+song+free', is identified as a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a programmatic construct for distributing 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.link/wix?keyword=thousand+miles+song+free
    • https://static.usrfiles.com/ugd/9219f8_e033266dd476493695026562417cf902.pdf
    • https://static.usrfiles.com/ugd/0bcf16_4513a381fadb43fcb86e14bddac2dd5f.pdf
    • https://static.usrfiles.com/ugd/bf0735_fe7522e9783c49aabadd30cd825a268c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e07387318ce4705b798c2e772f050b9.pdf
    • https://static.usrfiles.com/ugd/34ec99_33698e3a5ca94eeeb709387ea5bcb655.pdf
    • https://static.usrfiles.com/ugd/5de1df_6b4629e105b94dcd9affd5ee7703767d.pdf
    • https://static.usrfiles.com/ugd/384ea4_310f01a0bbcd4e25b5351b722b6445f0.pdf
    • https://static.usrfiles.com/ugd/6cfc61_29f607e3b30448c2baac72a2e4ec94a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8a150c37262438780fc918b9154f90a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/kipuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/76342839913.pdf
    • https://static.usrfiles.com/ugd/735424_9dd32b35051e45bf8315092e4616326f.pdf
    • https://static.usrfiles.com/ugd/865d50_8465c682a5cb4b45b7940e64326c6f55.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_off00009822.bin
2f9b29936540bc190eaf03721b093ff4ce3600371543fdac30ae7742594dfa8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9822 5268 bytes
font_01_sfnt_off0000a9e4.bin
f4fb13dbc6d7dbe6fde33c748bef6adde1099c5e411de97b0a44cb4b14d35f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E4 11472 bytes

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