Malicious PDF — malware analysis report

Static analysis result for SHA-256 932d5e183fa9d6a9…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 11:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01be65d9a49900944a783d7415ca336 SHA-1: 20766ff1e94947fb344140b3e0931cfd9707a573 SHA-256: 932d5e183fa9d6a9f20db4ee0a327d932f24f2ab8aa7020ee25da195a384861a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve SEO for malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=marketing+pdf+download
    • http://wifufapuk.britainunravelled.com/uploads/1/3/0/9/130969742/lixosejax.pdf
    • http://files.cooperscrossroad.com/uploads/1/3/1/3/131383456/zilejidofukonez.pdf
    • http://files.collectorsshowcaseglass.net/uploads/1/3/1/0/131070718/5b5b6.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/85583498355.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/discord_profile_gifs.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6620/files/nigetolopobofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0577/files/pedek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/renukofakegavoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/46840107201.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/54397332003.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/82969509682.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/kazoxizemumoforegalulux.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/75727140924.pdf
    • https://cdn.shopify.com/s/files/1/0443/9543/0054/files/29679932777.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/royden_solutions_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064af.bin
7900cc2185baf80ac21e7c91ef75a1685523fcced8e9a500d6b34ef28a7ad197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 4980 bytes
font_01_sfnt_off000075cb.bin
b9bfab4f65de201299e0e351a807d0714ec389a1863fc81f3bcbca1c2518efc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 10128 bytes
font_02_sfnt_off00009885.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9885 4324 bytes

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