Malicious PDF — malware analysis report

Static analysis result for SHA-256 4711c185cd3392fa…

MALICIOUS

PDF

57.2 KB Created: 2020-08-14 13:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96f319594a79b77fe562254fadd5a683 SHA-1: a01c74c03a11a7097563f15e387bcb9cdb331aea SHA-256: 4711c185cd3392fa3ff9dad1fb014ac8b3e36413c56ad02d234e08eb136b6890
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a malicious redirector link pointing to ttraff.ru, which is a known malicious infrastructure. Additionally, the document body contains instructions that lure the user into executing commands via copy-pasting into a shell, a common technique for downloading and executing further stages. The presence of numerous external PDF links suggests a link farm for SEO poisoning, likely to attract victims to the malicious redirector.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=leersia%20hexandra%20pdf
    • http://files.anovelcache.com/uploads/1/3/0/7/130776046/kixapi.pdf
    • http://files.anamnostoshouse.com/uploads/1/3/1/0/131071145/tavak.pdf
    • http://jisatul.diaryofaspectator.com/uploads/1/3/2/7/132740541/kenonusogoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/31711074210.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/50341063462.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/catering_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7099/files/kufetewakine.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/rainbow_mage_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/98189628347.pdf
    • https://cdn.shopify.com/s/files/1/0445/8987/5364/files/90875677097.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/tufameke.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/lidorufiborinonepom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0271/6572/files/cadena_de_suministro_lala.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_off0000a130.bin
195eb5b506dc045a86e6b38d558f9cb35d59bf86c8ad603233f1e2d8d0cdc7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA130 5108 bytes
font_01_sfnt_off0000b28c.bin
f0c2cd3fdf51053b76489797876b93db5dfdb99e2a81d9ab2f840477026527f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB28C 10992 bytes

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