Malicious PDF — malware analysis report

Static analysis result for SHA-256 2846cc2d79fee3e8…

MALICIOUS

PDF

62.5 KB Created: 2020-08-30 13:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d1f6666dddb5681c0f315c01dab0e36 SHA-1: 1ad453bf976f65f5ed1e67fa676ef3150814013f SHA-256: 2846cc2d79fee3e88378f4bbefa9cf52041ea35e05b27fa6b59972d2f65a0c91
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.cc/wix?keyword=maniobra+de+foix'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing this finding. The presence of a PDF link farm heuristic further suggests a campaign to distribute malicious content.

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.cc/wix?keyword=maniobra+de+foix
    • https://static.usrfiles.com/ugd/b8c837_aabc427c43f2495bb4eb577199b2d6a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8049b98673904312b7b2d5c28064677c.pdf
    • https://static.usrfiles.com/ugd/a1fb72_396d46e68a244bd59bae198e22a8890c.pdf
    • https://static.usrfiles.com/ugd/97aff7_2d788e3fb0594b40ba86aca72e6a27d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a62c270f324bc7b01851bbe0b92512.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/problemas_de_mcm_y_mcd.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/9595440528.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a6596119524cc8bfee711c6534483c.pdf
    • https://static.usrfiles.com/ugd/4f270c_a358447895a7464fb521d77001ba8495.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b8e7b476734cdd85e02ed1c7314eeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_eae511e1d280401e82e865bf8488f0b6.pdf
    • https://static.usrfiles.com/ugd/cf14a4_184cd6da3e2143d9991b6c9f85677890.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_off0000b78c.bin
91790877c1b0d6f71fe10494859afb613bc7fc45ea6196e006d7fc113b8036c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB78C 4904 bytes
font_01_sfnt_off0000c84f.bin
5bc8eba5744466b38a9aa55ec42e3818a1c4c146a4d060aff3405e285f9fcf03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC84F 11380 bytes

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