Malicious PDF — malware analysis report

Static analysis result for SHA-256 5951004b59878d0c…

MALICIOUS

PDF

37.7 KB Created: 2020-09-05 16:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689387ed1bc510521b93b121a1eca598 SHA-1: a018c4e5b34d2cce85759831063fbc58c97b5560 SHA-256: 5951004b59878d0c399f8f80c9a527edbcda303fccd28c6fdc355e0d3c716bcf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=square+root+of+337+in+radical+form', which is flagged as a malicious redirector. The presence of a link farm heuristic further suggests an attempt to distribute malicious content or engage in SEO poisoning. The file is generated by wkhtmltopdf, a tool often used to create PDFs from web content, which can be abused for malicious purposes.

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.me/wix?keyword=square+root+of+337+in+radical+form
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/11733184820.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/11382599314.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/global_business_today_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/2012_honda_civic_manual.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_163e12c75f0c4c69b4a19e3192052a86.pdf
    • https://static.usrfiles.com/ugd/67e251_3f50756b545e4e00878d92efb415e007.pdf
    • https://static.usrfiles.com/ugd/cc1a03_c5f60ebd2f2747cbab5edcab1546db0d.pdf
    • https://static.usrfiles.com/ugd/c162b3_4097091c135b407990ef1d752a085852.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.pdf
    • https://static.usrfiles.com/ugd/2ca22b_87c0e600173f437a9d4496f84b8cef67.pdf
    • https://static.usrfiles.com/ugd/30ea26_fe04178d833349e185d05301c43dbfeb.pdf
    • https://static.usrfiles.com/ugd/d1c05f_c58936a9e1b94fb095bedc036e9bf3a9.pdf
    • https://static.usrfiles.com/ugd/a474dd_e5e40cf723ca4013add635f178666793.pdf
    • https://static.usrfiles.com/ugd/8a419d_16bd62e6cb38486da58788f069675a0d.pdf
    • https://static.usrfiles.com/ugd/717a42_e0fbb10d741940b0a638779f290ab3d6.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_off0000551c.bin
66a0c42dc8412b48fb1e1e6397692d159e290bd3534c2a79018ac2436dc0b3e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x551C 5464 bytes
font_01_sfnt_off000067a9.bin
60362a2d8f8033d03c86954cf309ba83d14e24275a6c9cc5f6f65d793d1e2240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A9 10160 bytes

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