Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af36474a2daae7e…

MALICIOUS

PDF

33.8 KB Created: 2020-08-24 08:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1f07d8552e8b663df1c83635454c82 SHA-1: ded9a0b5865cec48484827c0a1457ed299f18ed6 SHA-256: 7af36474a2daae7e4caa2ed6f34c94686212637696210a3372d9869dcbbe6f9b
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, many of which point to a link farm hosted on cdn.shopify.com and a redirector on ttraff.ru. The primary heuristic firings indicate that these links are part of a malicious redirector scheme and a PDF link farm, suggesting an attempt to lure users to malicious content through SEO manipulation or phishing. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=dorika+assamese+full+hd+video+song
    • http://vitodupuj.baderministries.com/uploads/1/3/0/9/130969060/zoxenakef.pdf
    • http://xarumeb.inaded.org/uploads/1/3/2/6/132681670/rafevenanagole_mojuxo_favoketizonu_bumejiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/bufezagige.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/grafoil_gasket_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/bhagya_chakram_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/zewovudibimijumusol.pdf
    • https://cdn.shopify.com/s/files/1/0449/5589/3928/files/coreldraw_x5_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/adolescent_needs_and_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/ford_tractor_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/free_mechanical_reasoning_test.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/fezugiwida.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_off00004758.bin
ef33d62a83c873ccd5cca5f0d8740b24f176f18833f1139572fab1f6bb6e4735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4758 5444 bytes
font_01_sfnt_off000059ba.bin
d098323849bade5a6662da5f41b7be6aceef3ff87cac2dd6714041e83b3e2b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BA 9672 bytes

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