Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51b020784b2008a…

MALICIOUS

PDF

64.6 KB Created: 2020-07-21 22:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0413a6efcf69957f722236b2c31a767f SHA-1: 35d65aa716298cf97060234671608b42aa9ed615 SHA-256: c51b020784b2008ad9a81500899a170f933106af5f1917423808a5ef8a4f37f1
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a known malicious redirector, ttraff.com, which is part of a link farm designed to distribute malicious content. Another critical heuristic identifies it as a PDF SEO link farm, with numerous links pointing to PDFs hosted on cdn.shopify.com. The document also employs a social engineering lure, instructing the user to install a browser extension or update to view content. The primary malicious IOC is the ttraff.com redirector URL.

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.com/pify?keyword=researchgate+download+pdf
    • http://files.ronjasvaneborg.com/uploads/1/3/0/8/130813357/zewudo-tekekusomaf-begubikewasi-sazodena.pdf
    • http://files.midlandboxerclub.com/uploads/1/3/2/7/132741764/20dcdc8f4d1.pdf
    • http://files.teachartathome.com/uploads/1/3/1/8/131871518/tibexo.pdf
    • http://files.coastsidelutheran.net/uploads/1/3/0/7/130738753/kizarejawababul.pdf
    • http://files.cariblit.org/uploads/1/3/1/4/131406717/podexolifonubap_menisalokafu_birigegixuxud_rakuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/68275512779.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/xonexogivubutujuvulefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/tekagunexeset.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/mokopekurelodagu.pdf
    • https://lekaripemuwi.files.wordpress.com/2020/06/bananut.pdf
    • https://wufubupaku.files.wordpress.com/2020/07/14789404456.pdf
    • https://wexisipifaw.files.wordpress.com/2020/07/lifumegowulidolalemuwek.pdf
    • https://dopuzifiza.files.wordpress.com/2020/06/32651996476.pdf
    • https://ruxurogizipo.files.wordpress.com/2020/07/timelewowuvepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/lenurozapuweseti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/85118608967.pdf
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/xisamutopogoluvof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/48373598211.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/33900046130.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/61036024388.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/39555210380.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/dogunijuvewilukofiwek.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_off0000bdab.bin
320e7c98cd36f4cecd18c5741f0f73981ac2cfbd22f90c82153479c6304919fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAB 5256 bytes
font_01_sfnt_off0000cf97.bin
b33a1a331439d0e5e7927140b3cef2f479226fcfe544a6c36b06e6474cbf0330		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 10892 bytes

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