Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7a88b9885a7c88…

MALICIOUS

PDF

38.8 KB Created: 2020-08-31 20:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c2795aaff00bceaf32de609fb9a441 SHA-1: fa82e69d7ec6bc410eac14644a511c3e5313db16 SHA-256: cb7a88b9885a7c8808af7a352bf713d4bca9b2c89022633beca5bc75b2116f6f
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious component. The document body, though heavily obfuscated, contains the same malicious URL and other URLs pointing to Shopify, suggesting a coordinated effort to distribute malicious content.

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.com/wix?keyword=caricature+maker+software+free
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/sql_server_2012_sp2_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/8488421269.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/gewaxuvagupewipa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/tuguxafodepafijevuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/vuxuwupe.pdf
    • https://static.usrfiles.com/ugd/ca300b_7db2120e125146fbad17739bb7ed815e.pdf
    • https://static.usrfiles.com/ugd/d5415a_81cbbdd88ce74d04844cee0ebdc5b764.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/43815249650.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/zupamebilovifoferep.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/zewixexevutawinajij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/worldfree4u_bollywood_movies_full_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/car_lighting_system_circuit.pdf
    • https://static.usrfiles.com/ugd/ea2f88_e35f554f27f84481b6d3acc1f341d5c7.pdf
    • https://static.usrfiles.com/ugd/8127dd_8e0184b7257f465984e455e7e6dd3f20.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_off00005964.bin
0f876dbd882d26fbdb2ee317774fda014fc1406fe403dd115190f773bf565237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5964 5056 bytes
font_01_sfnt_off00006a8f.bin
12e8c85a7ad003f3a592a4c6ccf022a82f9663166c8b8003ccdd31b3d0569e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8F 10588 bytes

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