Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4868ce31188fbe4…

MALICIOUS

PDF

48.5 KB Created: 2020-08-01 17:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4209c67303b7a2e0e756a475921eb805 SHA-1: f102ec133568c3249009a91a3fd3f270ccc67791 SHA-256: e4868ce31188fbe4ed7551319345c22fbcb41cd0f4bfd8a99a08b198d20e3833
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=reverse+a+string+in+c%252B%252B', which is likely intended to lead the user to malicious content. The document body itself is heavily obfuscated and contains the same redirector URL and several Shopify URLs.

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/pify?keyword=reverse+a+string+in+c%252B%252B
    • http://files.seacoastdockdogs.com/uploads/1/3/0/8/130813710/loxena-wegedugo-mitotizanu.pdf
    • http://files.mkeddleman.com/uploads/1/3/1/3/131380107/1f26aab2363b.pdf
    • http://files.animaleyeconsultantsd.com/uploads/1/3/0/7/130738637/85399a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/fowoxadisilop.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/22881601042.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/59056752633.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/4824458062.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/90758544429.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7702/files/bamekuximipazep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/96196284590.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/59574537508.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/lapaliwetexiwijaguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/bunarolazuwozaxuzaxufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/tapivisobatofutokexapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/pujopoxibakatojidireje.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_off00007020.bin
c4245467e31568b6e9b1c0ea855945f9419d2a0c6f39d26db86c1535d74fb3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 5004 bytes
font_01_sfnt_off00008144.bin
e453304bff28f6887f533fbe28fda0ba0729f805d041a59a5f46782dde2912b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 15880 bytes

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