Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c19ff7d3c5b5d…

MALICIOUS

PDF

54.7 KB Created: 2020-08-08 00:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01557827f38f5ff35bd12edecb7104fc SHA-1: a120d8ff817be432a17012283722991ef22ac5ce SHA-256: 878c19ff7d3c5b5de42ef93b590540dd42bafc3fdbbc1c0185f8c4595f7542d2
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a PDF about 'basic pharmacokinetics'. The document also features a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

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/wb?keyword=basic%20pharmacokinetics%20second%20edition%20pdf
    • http://files.pinchalog.de/uploads/1/3/1/4/131454620/zivavegozatizinaw.pdf
    • http://files.shoreexcursionsambercove.com/uploads/1/3/0/7/130738960/leronavekawul_togifivijiref.pdf
    • http://files.hawkesburyartist.com/uploads/1/3/2/3/132302859/zojizobukop-tetinedif-xasexemiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/webekekafalurawave.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6322/files/54349853249.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/79106777895.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/kemabufuwegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/libro_el_cerebro_obeso_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/kerijatajuvubatit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/94102562648.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/37989150166.pdf
    • https://cdn.shopify.com/s/files/1/0449/8613/8792/files/osaka_amazing_pass_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/returixefora.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/xapafotuzini.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/90411059009.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_off00008bf7.bin
fc9764978e47c7c446f2c71656eb2aeb35c6c404998891f5ab2de11eaf793328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF7 5476 bytes
font_01_sfnt_off00009e6a.bin
d5b7d2980a3e67dea4a1e81bdfb46977674bdfef96fc002c3255e7b2ee9284ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6A 15352 bytes

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