Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cadccc4a7ef3cbe…

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 18:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d096b32a835cd794c9570e0692ccd57 SHA-1: dad98b3156afa7a378e6647a6906ea06612ece44 SHA-256: 8cadccc4a7ef3cbe53b8ee38a6c4b0e4dda01fc2f4c5011d0174150a9a4f5899
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.me/wix?keyword=when+god+created+me+meme+template'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool to disguise malicious content. The primary intent appears to be redirecting users to a malicious site under the guise of providing a meme template.

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.me/wix?keyword=when+god+created+me+meme+template
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/project_on_casein_in_milk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9175/files/maxid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/40770061554.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/definicion_de_epistemologia.pdf
    • https://static.usrfiles.com/ugd/96768c_90dba6abb8814365b06cfa31e419788c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdf
    • https://static.usrfiles.com/ugd/9904c2_015b8d7dc4104d179e68ae3bd643eddc.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd8973795be41eb839cd04e31656ea2.pdf
    • https://static.usrfiles.com/ugd/2b98a3_bd1ad8446b7c4cd5b02dddfb3a3e0f80.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/numerical_methods_chapra_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/dafugovivagegokenasegisom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/fezasajafawujewevozoweja.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4678/files/animate_jquery_transform.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_off0000646b.bin
319f3e94dd06b9f682ab9378bb04cab65e2e3c131536f992d5a7301e8a939e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 5320 bytes
font_01_sfnt_off00007665.bin
465e53e87d508be0f1c72522154afb1f659756057f32c032ce1b08aa4200dd7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 9932 bytes

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