Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18d365c416e6169…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 06:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9a3d8093d42056347422f8edd1b182b SHA-1: 21f0a16bf95b4c3a6d333a973e8525da1584941e SHA-256: c18d365c416e6169e57472b0770de37551d99dc56b5156538e29b9faf9482ba8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is embedded within the document's text, disguised as 'Semi pro football sponsorship packages'. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which are benign Shopify URLs, but the primary redirector is malicious. The ML classifier strongly flagged this PDF as malicious. The attack pattern involves social engineering to trick users into clicking the malicious link.

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=semi+pro+football+sponsorship+packages
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/narrative_report_about_community_service_in_barangay.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/norotitumijibuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/83552879926.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/zufezerudozilipopogiwoke.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/wizod.pdf
    • https://static.usrfiles.com/ugd/9e53d4_260eee4e9e5e47b9b12222705b6da46d.pdf
    • https://static.usrfiles.com/ugd/b8c837_17a5fc63bfaa451aaf22abc72bd1edbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_af10a04a980c4568ba22dc6c15a8475b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0aabbc553d042b99877955f06c725cc.pdf
    • https://static.usrfiles.com/ugd/6cf392_6ff4209da6a0419ca820a35b3a0adcc0.pdf
    • https://static.usrfiles.com/ugd/b88e3d_aafb1fd4997c4e50b792417a44fa2cd2.pdf
    • https://static.usrfiles.com/ugd/8d0191_4c999abd1fcc485ca9da0225185160b8.pdf
    • https://static.usrfiles.com/ugd/cf79db_a27a0a7a47db4500a4efe95d73638978.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_6341d499bc82421ba88546efa6b8cbc6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/performance_parts_for_2018_honda_civic_si.pdf
    • https://cdn.shopify.com/s/files/1/0430/7186/4993/files/pofabelede.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/weather_report_of_pokhara_nepal.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_off000071d3.bin
a3c8927d0d8719b827aed0e236494142d21b13c6a5cc26363ea8bc755381f503
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D3 5736 bytes
font_01_sfnt_off00008521.bin
b2507c6103538874255892e039974338be101b179812e4bfbf874dce04715b3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8521 10524 bytes