Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26081ea43a51897…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 19:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1207c31f82f34922e08d53db04cad2 SHA-1: f0bf863bbfd39a58feb1d99d4985555d1de25360 SHA-256: e26081ea43a51897a3b317ea4402647ac18aa3b229927ae534784a4e801589d3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify and static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect the user to a phishing or exploit site.

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.cc/wix?keyword=chronic+calculous+cholecystitis+with+cholesterolosis
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/belajar_bahasa_inggris_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/alliteration_worksheets_for_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0454/7926/4406/files/atkinson_hyperlegible_typeface.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fab0fb2f8284ee8a177317f2dddbf43.pdf
    • https://static.usrfiles.com/ugd/dad90e_f464e54b7bfa4d2e9b714b702f7a8ee8.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc29d997332d4c2399494376c25d3128.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbbfd0603f3e4887bbdb92b5c4ab1d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_b55d77bceb06494d8662c7c9e1aa4fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_93fb442f601d4f1396acf8fe3e42e002.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_01f81f084f564b0c907b88400b0a68c3.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_off00006c86.bin
d3336be671bad67a202d908dc2cdf2235d088f391282743b5dab01d2d3a10ce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 4984 bytes
font_01_sfnt_off00007d7d.bin
f2e57abe12894ed3cfdfe002b7b2a9637321df3f780816c22cb9f37baeed1eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 13484 bytes

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