Malicious PDF — malware analysis report

Static analysis result for SHA-256 46556802c244dcc3…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 14:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82cb5fb9fa6272c5acda0b1abde92409 SHA-1: 019bd36b763dd1fb0e5dba332ba63142900676e5 SHA-256: 46556802c244dcc3c7a6d0cd2f1abe5a7afdd754410f682c70a8e4e952de8d0a
120 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 'https://ttraff.ru/wix?keyword=z+nation+free+download'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The PDF also contains a mass external link farm, with many links pointing to Shopify and static.usrfiles.com, though these appear to be benign. The document body is heavily obfuscated and contains what appears to be a reference to the malicious URL.

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=z+nation+free+download
    • https://cdn.shopify.com/s/files/1/0452/7469/3794/files/autonomic_nervous_system_pharmacology_mnemonics.pdf
    • https://cdn.shopify.com/s/files/1/0435/1030/0831/files/word_search_solver.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/repuzilawagadirekek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/inspired_beginners_spanish_podcast_10_este_mes.pdf
    • https://static.usrfiles.com/ugd/3b47cb_3e54f80ab44d4f2991c2896d8fa546d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d53bc815e558492dad8179af7870df1e.pdf
    • https://static.usrfiles.com/ugd/e745be_169d62aa48314192b3519cd824d161ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d5665c94c84289bad72b7396d0bf35.pdf
    • https://static.usrfiles.com/ugd/b8c837_7da62ddf428d4411bc5e387e0441d49a.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
    • https://static.usrfiles.com/ugd/80c1db_a4703f3d2fe847c681e1d963b34f64c6.pdf
    • https://static.usrfiles.com/ugd/e745be_1fbe667f26534da194063d2e3aaf6569.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d73cf8433204135b91e152131b56768.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_off00006d35.bin
a8eb35eb44ed466479f7e86383820dc2c5eb0818de70006e8bfec976f497b10c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 4772 bytes
font_01_sfnt_off00007d91.bin
619c4e35677430ce31e850d825b5e237646bf9e8052f2ecbd2d209acd400ed9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D91 13824 bytes

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