Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c67db3820c900b…

MALICIOUS

PDF

45.8 KB Created: 2020-09-02 18:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7910197d3532e0fddfbb3c4389d2f1fe SHA-1: 681649fdb3efe783ff22baa3115e3a005daa364a SHA-256: f5c67db3820c900bf870027773981f0d764e2e48288e65e0cbbf09a38695dfe1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=consent+letter+template+word'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0430/2356/4957/files/zimipevanebitolenubobi.pdf'. The document body, though heavily obfuscated, contains the same URL as the redirector, reinforcing the lure. The primary intent appears to be directing users to a malicious site under the guise of a document template.

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.club/wix?keyword=consent+letter+template+word
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/zimipevanebitolenubobi.pdf
    • https://cdn.shopify.com/s/files/1/0449/2728/7451/files/platformio_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/97658488169.pdf
    • https://static.usrfiles.com/ugd/d216cb_caffc0afbc3a4bf2b677643c90c2087f.pdf
    • https://static.usrfiles.com/ugd/1813b3_b41d98f36a454f6481480fdce7e1eeab.pdf
    • https://static.usrfiles.com/ugd/804ff6_927ffa699cd5488eb45f9a9618650431.pdf
    • https://static.usrfiles.com/ugd/6908d7_40a01a54e5bb4a3daf01efc6c09e959e.pdf
    • https://static.usrfiles.com/ugd/47b1e8_1db4852cbde2418e921ea0079e212f5d.pdf
    • https://static.usrfiles.com/ugd/a72fa8_bc32f85a4d0141248ebe3795c3767bd9.pdf
    • https://static.usrfiles.com/ugd/fd7405_483d181d53db4ae89845505d7f3f83a0.pdf
    • https://static.usrfiles.com/ugd/253000_12e47840742242348568819c100e59dc.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/
    • https://static.usrfiles.com/ugd/1813b3_b41d98f36a454f6481480fdce7e1eeab.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007781.bin
cc2c5972524d6a7d999cae827a731cd62e49a4def1042e67f3b5fba689fc2b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 5100 bytes
font_01_sfnt_off000088c6.bin
d78b50dc26dd328bb1b64edbd55c55b564a25d8e556c11b5146a9de257618e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C6 9884 bytes

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