Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7d38171519053a…

MALICIOUS

PDF

41.1 KB Created: 2020-09-03 23:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03232718f5d75aa39c269083e46ebcaf SHA-1: abb32052aaf8f2511697c190ebf72898de509a89 SHA-256: ed7d38171519053a569d9ac94be4835aa04b70603d5e048dc218c59106e41fd8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL and several other URLs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the overall structure points to a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=symbols+used+in+editorial+cartooning+pdf
    • https://static.usrfiles.com/ugd/921909_f2be8bdbd6c64acc95d8c3babe7453eb.pdf
    • https://static.usrfiles.com/ugd/b9801a_e49fb2dd0239471480fbc31b3c8682cb.pdf
    • https://static.usrfiles.com/ugd/238140_d230054063274fd5a48e739a0d07170f.pdf
    • https://static.usrfiles.com/ugd/cc03df_4d0dfda42f264b60a00f8b5980cf9687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/93142076630.pdf
    • https://static.usrfiles.com/ugd/cec570_2ec511c2b5214d8dbbef7537409c35d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddb5693a4e1948ef990733007f7e0f32.pdf
    • https://static.usrfiles.com/ugd/0a593f_6e200c253da74dfe85c8ca3a99ee4cf1.pdf
    • https://static.usrfiles.com/ugd/a18aa6_76ee8ae66a914107a999373ea0c11b96.pdf
    • https://static.usrfiles.com/ugd/32acb1_1a64231b2bef4252a42edb8f3f26a3ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_d960f1f71f894325888f121507b199c6.pdf
    • https://static.usrfiles.com/ugd/824332_97b65f93bafb49f2bc12ba17adbd46d1.pdf
    • https://static.usrfiles.com/ugd/eed56f_d80432d6482c4293a3f3216a10edb5b1.pdf
    • https://static.usrfiles.com/ugd/105a8c_7c9e7c15cf1949ed9491f9a2489eb238.pdf
    • https://static.usrfiles.com/ugd/b444d4_36e1e96343fb4d419c8f5c12ee8fb2d3.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_off000060d3.bin
d47c52fd778ec511101182dbb9fabc279412b283ae1a6d391dfb017a56706e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 5820 bytes
font_01_sfnt_off00007490.bin
efe1a8c5dffcbd06a5e8936ad387b3ca4e10abf24be53c4746ecbb5255b2a9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7490 10076 bytes

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