Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9bbe9f79ea9c046…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 05:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b33d38ef7e4e8556117bd892d24e91a SHA-1: d6bb53c42cf93aa98fe593f2b92bfa5f6f26c986 SHA-256: d9bbe9f79ea9c0469824cdb48837f2dfc0426c06770e9796e54f58866de82b53
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 external links, a technique often used to create link farms for SEO manipulation or to direct users to malicious sites. One of these links, 'https://ttraff.link/wix?keyword=architecture+admission+portfolio+examples', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous links, including a malicious redirector, strongly suggests an attempt to lure users to harmful 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.link/wix?keyword=architecture+admission+portfolio+examples
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/64456578553.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7591/files/university_physics_12th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1285/files/atmsfera_primitiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/16515494058.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/certificate_of_achievement_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/nomiwebivolidamakiserav.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/13360177629.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/86764764148.pdf
    • https://static.usrfiles.com/ugd/e2b09b_e17a33ac602742cc9cb53986aad6bc54.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8cd5ee44960487a982fb377bac65caf.pdf
    • https://static.usrfiles.com/ugd/e4ff69_11763041c2214d518edbcf8e05692354.pdf
    • https://static.usrfiles.com/ugd/accd1f_6c9554b2e2a84b929834e1f1f5865976.pdf
    • https://static.usrfiles.com/ugd/b8c837_676b10df6a5a49e8b9d0f0192a7b4ade.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://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d2.bin
2d8be16bf6145e574cf9df1b6b661028029c022d6c1b98cba050c288b58b1e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D2 5452 bytes
font_01_sfnt_off00008735.bin
094bf81e3c2136425f06fdb52e369a65f365f159475ba222cddd6ba25379bb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8735 10016 bytes

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