Malicious PDF — malware analysis report

Static analysis result for SHA-256 406d2c8c6d3c4a38…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 22:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ab77372cbe72fa4dce19055509ab01 SHA-1: fb6bb5c04cb63b6a083612a0351726a55a1b2596 SHA-256: 406d2c8c6d3c4a38b4a18722812d7e36f1c74b6c91b640109c25cb565a0d4b41
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=how+to+be+miserable+40+strategies'. The document body, though heavily obfuscated, appears to contain this same URL, suggesting the primary intent is to redirect the user to this malicious site. The file also contains a large number of embedded links, flagged as a PDF link farm, further supporting the malicious redirection attempt.

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=how+to+be+miserable+40+strategies
    • https://static.usrfiles.com/ugd/b8c837_73a80f57492649dd8f59a51421ebdead.pdf
    • https://static.usrfiles.com/ugd/b8c837_43deaa3efff0478aaac26c00240fc6a9.pdf
    • https://static.usrfiles.com/ugd/b7ab08_7e4559181fb24cb3988bf9d8759793f0.pdf
    • https://cdn.shopify.com/s/files/1/0437/4514/9079/files/wamewibunejomus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/39678837218.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/rewibugubesarisiwabeki.pdf
    • https://static.usrfiles.com/ugd/76de1a_de4c478c8c834aa0beaac89aab9213bc.pdf
    • https://static.usrfiles.com/ugd/73c254_503175dadf5d439a87755496a04862f3.pdf
    • https://static.usrfiles.com/ugd/822ecd_3c501569c1ac4c18985e2d16afa01622.pdf
    • https://static.usrfiles.com/ugd/d01287_fcd0adf7d16346bb9d11c7d4300060cf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/pagobunikikufilabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/57083680166.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_off000073d2.bin
254d16a39345826ad57e5547987ab5cd04aa4182dd57ba1d2d2976d4c4422eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 5428 bytes
font_01_sfnt_off00008645.bin
141dbb4c98d88aad2a385e848f6145074696497324857e71c8d420e4666d7c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8645 10660 bytes

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