Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a288329155fb4d7…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 22:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99deb66d79598f27d1e1b6024b70fc2b SHA-1: a682740d70e6a876ac707789a0baca06de9fc54b SHA-256: 9a288329155fb4d7a4b9968be40fd0a16e263465a2fbdcee3f9d933514e3c0ca
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, designed to appear as a link farm. One of these links, https://ttraff.ru/wix?keyword=base+salvage+capsule+nms, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

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=base+salvage+capsule+nms
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/postgres_show_indexes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/substance_abuse_counseling_theory_and_practice_5th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/venokezedoginivojeminelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/27412045241.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/17820255795.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/7921276233.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/fluke_fishing_report_ri.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/anganwadi_sahayika_form_rajasthan.pdf
    • https://static.usrfiles.com/ugd/b91566_1ef40febb6b1486fb25176e4507c5356.pdf
    • https://static.usrfiles.com/ugd/565485_380dd7f1fc33467397ca7717a3e0951b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c4be4313a44495b99655cff6b94bfca.pdf
    • https://static.usrfiles.com/ugd/b8c837_affe1b30498c467f87c4f69187cf9570.pdf
    • https://static.usrfiles.com/ugd/b8c837_476e506ee621455a999c44bbb08bdf8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d956ce77f8b44fa80c665f0e1b82399.pdf
    • https://static.usrfiles.com/ugd/b8c837_e970a08bb34040f18b03cb4b73bfd364.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_off00006a85.bin
272570d95c9605177ec1ffd590a89ccf8397d132ea958707ec1bd9a528dd7f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5268 bytes
font_01_sfnt_off00007c69.bin
8b32774446bde7c62da8d177e5bcb2300b9883198f8360bd0682c446d9a9a240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C69 11024 bytes

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