Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3ed2dc7745b58c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 21:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ce748db7c80640046392c7d35c9dac SHA-1: 99ed2b3a2b95e3264b05ccfb5d37fe014ffe49e6 SHA-256: 2b3ed2dc7745b58cda83b0906e8b4de08c4d6b448941cdda672e0c7b6ae4936c
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify and static hosting services. The primary malicious link, 'https://ttraff.ru/wix?keyword=cuales+son+los+principios+eticos+fun', is identified as a malicious redirector. This suggests the document is part of a link farm designed to direct users to malicious infrastructure, likely for phishing or malware distribution.

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.ru/wix?keyword=cuales+son+los+principios+eticos+fun
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/23997105081.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/63517087107.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/ernst_cassirer_philosophy_of_the_enlightenment.pdf
    • https://cdn.shopify.com/s/files/1/0434/5069/5830/files/74489764665.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5f197fa1dba41a3a3ca7ad07fcf0220.pdf
    • https://static.usrfiles.com/ugd/99afdc_e4d39826179041c39c5427ae6717497b.pdf
    • https://static.usrfiles.com/ugd/2e16aa_b36231a7a6ce4a57aee6e1bb7c1e44db.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_a3e4010315c9495087585d46576ed5cc.pdf
    • https://static.usrfiles.com/ugd/c0b427_7ce55e66c5554ec18ed2837de28eb0f4.pdf
    • https://static.usrfiles.com/ugd/cafc24_99b565d6c7de4fd3b72aecc97f09c745.pdf
    • https://static.usrfiles.com/ugd/b8c837_d224297b83204df286bf3ea34a045d72.pdf
    • https://static.usrfiles.com/ugd/d01287_4ab124a621184315b57fe8d306df8d74.pdf
    • https://static.usrfiles.com/ugd/b8c837_3350e7732eff4e7ebd18d9e202cbc4ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_57978bbb18fc40db95180635c483c4db.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_off0000646b.bin
ed10fca1e4b4850242f030e3b94a5e1c2c07ae817bfd6d5e4d4b84a8aeef33ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 4916 bytes
font_01_sfnt_off0000752a.bin
45b099d07e7da3c266e9cea27eb35f91e0fda6ffe4c7b3f69baeaae76ad2a077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752A 11072 bytes

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