Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e876ba487e2897…

MALICIOUS

PDF

40.5 KB Created: 2020-08-15 20:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78bc14309610255b77de099f2d55ed1b SHA-1: e10c1dd8ee3d49067c9593086a3064715e4a700d SHA-256: 30e876ba487e2897cb0e6c416771a99d3c2aad73f606275f41828509fd64a726
120 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, specifically pointing to 'https://ttraff.ru/wb?keyword=colour%20mixing%20chart%20for%20acrylic%20paint%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The file also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm or SEO poisoning tactic to improve search engine ranking for the malicious URL.

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/wb?keyword=colour%20mixing%20chart%20for%20acrylic%20paint%20pdf
    • http://nopus.parkhillbowlingclub.com/uploads/1/3/0/8/130814124/2785835.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3554/files/81824839978.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/gujulawelokurojuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/git_diff_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/mixekarigajerurifajol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/l_alternance_politique_en_afrique.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/93581280998.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/funodosil.pdf
    • https://cdn.shopify.com/s/files/1/0448/0362/1025/files/tratamiento_nutricional_para_esclerosis_multiple.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_off00005fd5.bin
2bc091eeaf813f543cb844d30f21de136d35cb5d4f58eb2af7cb1d63f2f5f623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 5464 bytes
font_01_sfnt_off00007249.bin
75bae864ab91f78a540863d7d9891c43b758c50692a29cbf5f9b0f571c2f5de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 10128 bytes

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