Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc6db33faf504d8…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 18:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d3de26354801e618cde2dc741eff423 SHA-1: 3c2b113ec26c76cc0f82e7278b9944aaa2d63887 SHA-256: ecc6db33faf504d853d80454d08961383ede81e27a10a77a3cfdaec6d4b0c1c6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body also contains the URL 'https://ttraff.ru/wix?keyword=5+dl+en+ml', which is likely used to direct users to malicious content or for SEO manipulation. The presence of numerous external PDF links further supports the attack pattern of a link farm.

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=5+dl+en+ml
    • https://static.usrfiles.com/ugd/b5472a_c4c6f6a3a7f041d08115890da7e06f6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_33b5473b48854912a814f3597e7a1539.pdf
    • https://static.usrfiles.com/ugd/b8c837_051ad0a2673f4287b6d7440a6db212f2.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_9ae07bc77fe74b0ba4c90204c1c1966a.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/49481738927.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://static.usrfiles.com/ugd/b8c837_2022674e470743d2b4a94ddb18289e38.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79fbc4fff6349d8a55de628fba08f0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d758355a40747b78d801443d6e8c92f.pdf
    • https://static.usrfiles.com/ugd/906e9f_fc0e32354c9f44a087f4d4afb89139c2.pdf
    • https://static.usrfiles.com/ugd/e745be_a8818e9b97d843399ef0b5e9a9d1e1f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_06c94ce8b47e43228f51319a208a66f1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b74.bin
cb5af57b9a2c7487b6f1459648e3d4e09b4e82547efdab526c77f9effc4924b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B74 4068 bytes
font_01_sfnt_off0000590c.bin
59db0fe1c309c45e85b608feabe2aa7d812caad9e1437ec13eb38baad0404245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 10228 bytes
font_02_sfnt_off00007c14.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C14 4324 bytes

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