Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef35235771ab799…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 06:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fa529e53a2e264f98845699dbd5655 SHA-1: d264a5c235dfd86b294a01bdc6909f800322b73c SHA-256: 1ef35235771ab7993beded9beee1062552ac544cd447a4b6ab6938924f3fb889
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wix?keyword=equal+time+rule+definition', is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'equal time rule definition'. No scripts were extracted from this sample.

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=equal+time+rule+definition
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/xedafuxukexurigigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/calculus_derivatives.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/nizunepazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/1st_law_of_thermodynamics_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/arthashastra_malayalam.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae0ff5563447b0846508726b71a5b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e934b1eb7db94ee79e3b7e0d26bc9e27.pdf
    • https://static.usrfiles.com/ugd/764aaa_97eee8223f4d4ec0a34c68a9e34db15b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4090fcf43e6a42b4878bfa469eef41a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a245929504a444c6b1b6c2df20d37b56.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebbf8250bd9413c8ee89fee0159f020.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebaebab9db8e494c85fdf9b5bd3c9800.pdf
    • https://static.usrfiles.com/ugd/c3f59f_93738409c1eb4e67af6324f1a4f0a132.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/jupafof.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/prime_math_diagnostic_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0429/8906/0259/files/learning_styles_theory.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_off00006984.bin
dbf7d2589115f39b65ae6456981bd83673745e70d903073439635ead63d0fc6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6984 4956 bytes
font_01_sfnt_off00007a47.bin
6e51327e767828b1dd3ef53a92675fbf67e3e5bf698a4e12d35261644ff7be10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 9936 bytes

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