Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9532c564abbff9…

MALICIOUS

PDF

33.5 KB Created: 2020-08-30 00:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44d11cf184f60fc67bdfbfe02655ac45 SHA-1: ff2dc10e92a486db7638ee0af6ffb124a64b35c7 SHA-256: ec9532c564abbff98787081996110db73d9e089efeb6fe19e14146e003ac8692
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=case+1816+service+manual'. This URL is presented within the document body, disguised as a service manual. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify and static.usrfiles.com domains, likely for obfuscation or to appear benign. The primary malicious URL is the most critical IOC.

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/wix?keyword=case+1816+service+manual
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/76676524256.pdf
    • https://cdn.shopify.com/s/files/1/0435/6446/6335/files/material_requirement_planning_nptel.pdf
    • https://static.usrfiles.com/ugd/b7082a_82884eae8b5e4c9f992bb4f920a1e996.pdf
    • https://static.usrfiles.com/ugd/b8c837_14dec97735fa48d18d97a2085a82bd09.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5fbdb21f8294122bed343ea0e67c279.pdf
    • https://static.usrfiles.com/ugd/8b97dd_7176c32e4fa54cdea2ffd2a16de2eaaa.pdf
    • https://static.usrfiles.com/ugd/1cfe37_b251186ec76540bfbe4ab7306a305090.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/chartmogul_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/47102611811.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a5f2dd4af0e47188c580170f612d5ce.pdf
    • https://static.usrfiles.com/ugd/429b25_da09b658cac040fe8a1783fa5a523f0a.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_off000044de.bin
3675493b2010d94f6ec339efb6d1af894ad506fae95d9e401d2b371351c480e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44DE 5308 bytes
font_01_sfnt_off000056d9.bin
a92ea5e1fbfbf8979bcedd71121893f8bde6c47df678f742cb992303343b0508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D9 10216 bytes

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