Malicious PDF — malware analysis report

Static analysis result for SHA-256 3341171e8b72b390…

MALICIOUS

PDF

38.8 KB Created: 2020-08-24 20:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58c543e16d0ce3dfcbafe0a9b1da8e17 SHA-1: 2ad47092688f0db936b5db7fd753a9015f6680f3 SHA-256: 3341171e8b72b3900bfce671fd3892dfdb96d2f07bea590fce50d8d3b4ec4679
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=arabic+letters+tracing+sheets, which is also listed as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=arabic+letters+tracing+sheets
    • http://bubari.mikeysbarbershopla.com/uploads/1/3/0/8/130874380/karenu.pdf
    • http://buwisu.hunnelllaw.com/uploads/1/3/2/6/132681396/bajeno.pdf
    • http://files.massmediamaker.com/uploads/1/3/1/8/131871980/mijimeko-bekub-kikakede-jemuxerarotigok.pdf
    • http://files.serviceccrunning.com/uploads/1/3/0/8/130873941/e987e9d8543f.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/28867297579.pdf
    • https://cdn.shopify.com/s/files/1/0435/5175/2344/files/break_even_graph_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/pokemon_ultra_moon_post_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/dovidefavedekifepojaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/zutenimojejilozezilanewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/pugapuzedefapotedev.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/tudosuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/4_your_eyez_only_dopefile.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8727/files/46695041424.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/learning_functional_programming_in_go.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/rimukuvigasiruk.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_off00005c15.bin
0522574a908620c7e2ca48341a617ce89387a7691056059eaa57e2aadff52754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C15 5192 bytes
font_01_sfnt_off00006dab.bin
338243609bc73818df19bf43eaff314414d33c260e50cd615682e7f51cf4c6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAB 9596 bytes

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