Malicious PDF — malware analysis report

Static analysis result for SHA-256 8262dce118100cf5…

MALICIOUS

PDF

44.5 KB Created: 2020-08-16 12:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b1f3873bc969fc23b307a0fc4d800e SHA-1: 99abaa5b9cc555d05d6a19a2ca0802b107defb2c SHA-256: 8262dce118100cf50139df3f75c2c8c468a70bd949e0cd58f54eb7d08605d1bf
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=catherine+full+body+ps+vita', is designed to lead users to harmful content. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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=catherine+full+body+ps+vita
    • http://files.creativconcepts.studio/uploads/1/3/0/9/130969896/c3825eb23c178f.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/8587402405.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/faveg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/wusumuzovig.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/entrepreneurship_lecture_notes_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/zelda_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/tipos_de_anomalias_cromosomicas_estructurales.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/62914316364.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/botw_title_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/tetoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/mathematics_formulas_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/talepusaragis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/self_appraisal_form_answers.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_off00006dd3.bin
721ae61f7546228d696c51325584c16ff5b3cd8cf11c41519efddf0b5efe08f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 5336 bytes
font_01_sfnt_off00007fef.bin
c2975713f3484599652f0e3fda61389aee997ba3b94f8bfda271c944c177f64c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 11508 bytes

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