Malicious PDF — malware analysis report

Static analysis result for SHA-256 be81a2a1c61ab863…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 09:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d88c473e4c203e8834bdef07af99715 SHA-1: 2113fd6cbcdadc4b89b7989c0ed6c6a23a0022df SHA-256: be81a2a1c61ab863a8496cf6c2f2f8a0be00eb6be3d3b82cbea1b1b8db0dbb70
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure at 'ttraff.com'. This suggests the document is designed to funnel users through a series of redirects, likely to a malicious site or for SEO-based traffic generation, rather than providing legitimate content.

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.com/pify?keyword=opposite+of+always+pdf+free
    • http://files.lynnkirkham.net/uploads/1/3/0/8/130874318/6548217.pdf
    • http://files.farmersunion.coop/uploads/1/3/1/6/131606546/2316712.pdf
    • http://files.phelpsoutdoors.com/uploads/1/3/1/4/131408415/nuvedezawova.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/boxing_drills.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/notelobonitapotitametu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/mugavoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/zegifad.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/mukezafovuvimebuzusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/fijodamobuwunafowuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/xemuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/zenenipebosapezepum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/83624123210.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_off00006114.bin
c421c7d7336495c363fa94bdb1ed6706a54f0ed510e4954b5ff82999fbc09adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 5256 bytes
font_01_sfnt_off0000730f.bin
edf0728003f4772442065f0551201d2ec10dd746dedb6c7b3c1482a7d185278d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 10564 bytes

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