Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed4d8881bea97cb…

MALICIOUS

PDF

49.1 KB Created: 2020-09-06 23:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0a55f6533e2852f6755cfe87823fe6a SHA-1: 362aa6fbe3adfaa034f8e7e159fca1459c1a653c SHA-256: 9ed4d8881bea97cb86b9099db6d1607fda3192c39133352fd97b1cebca1cff32
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 likely used to distribute further malware or lead to phishing pages. The document body, though heavily obfuscated, contains the same malicious URL and references to benign-looking PDF files, suggesting a deceptive lure. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm designed to improve search engine ranking for malicious content.

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=binibining+pilipinas+2013+question+and+answer
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/states_of_matter_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/38413058834.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/anaganaga_oka_ooru_video_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/37217930052.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/the_nail_fix.pdf
    • https://static.usrfiles.com/ugd/5926b4_de539c653af84f29a68587b8b12b67ad.pdf
    • https://static.usrfiles.com/ugd/8acad3_4917a8e0b20a414d98e78cf7c89a626c.pdf
    • https://static.usrfiles.com/ugd/edb4a7_d8716fb6335340c1b14cb0798b4c9006.pdf
    • https://static.usrfiles.com/ugd/4cf28d_f1d82238031b4dcb9dd384f5b82f9807.pdf
    • https://static.usrfiles.com/ugd/a474dd_2bacdf8ec5884ab9b4629ca4cd93cfe7.pdf
    • https://static.usrfiles.com/ugd/fd30ac_55dd0c1a9d834b94b5815f210da4e58c.pdf
    • https://static.usrfiles.com/ugd/b96e41_52e6d9023a36452faf39abf6ddc8509b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1ed68ff68d54656877f64cb1e053e6b.pdf
    • https://static.usrfiles.com/ugd/c836c3_454f150b115046edaa3e571c724e88e2.pdf
    • https://static.usrfiles.com/ugd/2a2e94_b409ab4454b74fc4a4f67fbc866a6667.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_off00007f75.bin
d5c01671bcd0871cc447b417d93c21f24c1e0b2babde4b076696dc25ffe3c735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 6024 bytes
font_01_sfnt_off0000940c.bin
f690777a0988c98fb6caad2f64a5ae1e09e090f381449e6b1e5c721a56c250eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x940C 10188 bytes

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