Malicious PDF — malware analysis report

Static analysis result for SHA-256 3012b0fb1d190949…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 07:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34994a8b8e5e53f0ac1c12bf018356c SHA-1: 4d9cf6fa366f4ac477cf8dcf4deb7a33c3fcc590 SHA-256: 3012b0fb1d190949c37e59aaf73ffeb33abbb166d8e83a3e2e54057b56355018
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, with a critical heuristic firing indicating a PDF link farm. One of the primary links, 'https://ttraff.ru/wix?keyword=corte+de+lamina', is flagged as a known malicious redirector. The document body appears to be malformed or heavily obfuscated, but the presence of numerous links, including those pointing to Shopify and usrfiles.com domains, suggests a social engineering attempt to lure users to malicious sites.

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.ru/wix?keyword=corte+de+lamina
    • https://static.usrfiles.com/ugd/b8c837_bf4b339f1a4347c79ef99a2861765bba.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e6aea36c5cd4d009ef0b9ffa9e8055f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5770c2a9c7b7448cb8eb3d7a6930f2fb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/how_to_draw_motion_blur.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/table_of_contents_template_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/aneurysm_clips.pdf
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/gexep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/ilango_medicinal_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/navor.pdf
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/55015440118.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/54027940806.pdf
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/sumiwubusado.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/chute_aana_chute_mujhe_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/zorifezanurujetuvomes.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_off00005d33.bin
e3968e2f8f9fc51296fa2cdfcf9db7aa563d9220bc92ad015956d5d4acc98ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D33 4700 bytes
font_01_sfnt_off00006d0d.bin
6124c6fc5426bc0a41b10b2902c60b60f3b474adc2c6e548c0287db351f34727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 11308 bytes

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