Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ff7be83deb5a94…

MALICIOUS

PDF

46.0 KB Created: 2020-08-21 01:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed057b186550a4826a93d59dcaa5806 SHA-1: cc788b6007df4ea4a9dc8615ec8c2c753cf14603 SHA-256: c3ff7be83deb5a9469315c355fdcc31176dce05fd8dfebee3f3cf230516c035e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.ru). The document body and heuristics indicate a social engineering lure, prompting the user to install a browser extension or update to view content. This is a common tactic to trick users into visiting malicious sites or downloading further payloads. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection chain.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=bookmarks+manager+android
    • http://dagavovip.portchteatogo.com/uploads/1/3/0/8/130814328/zulonitomazijesipig.pdf
    • http://files.eoccme.com/uploads/1/3/1/1/131164251/26bfbd77b8d2.pdf
    • http://files.silviossauce.com/uploads/1/3/1/3/131382274/wimikitimonenudom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/xaniwudapamoniragiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/cantos_de_adoracion_al_santisimo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/tumapukutotegiwozadafite.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/20277927437.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/kevaj.pdf
    • https://cdn.shopify.com/s/files/1/0452/0296/4631/files/la_tregua_mario_benedetti_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/juwekitetoxofatemijaxus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/tikizepujiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7110/files/wafebawinolukame.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/pijegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/zerizetegavajewowoxikusum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/goruwenapatatuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/xelatapumitodunep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/39200808352.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_off00006b44.bin
cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 3312 bytes
font_01_sfnt_off00007725.bin
6ce83f98a8d51bc3a9650cce50dbb24a3519c1ae08a1ec122d19aabad6e0a543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7725 5224 bytes
font_02_sfnt_off000088d0.bin
33bb7c7e21d75a3ecd37ddc8e517c43dea0cabf878836763268440ca3e7d87c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 9980 bytes

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