Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ec3dc3ed990749…

MALICIOUS

PDF

48.9 KB Created: 2020-07-30 15:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605330cff3e09827a55f04ede6ef2696 SHA-1: aa0679c51c1b1c87e592053a235eca936678a2ff SHA-256: e0ec3dc3ed99074961b70a48af3bd3d56358af790652e466ac1ab9bac19e0720
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting an attempt at SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious destination. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF documents from web 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.cc/pify?keyword=caries+dental+en+pediatria+pdf
    • http://files.spinalunwinding.com/uploads/1/3/1/3/131398097/3746671.pdf
    • http://files.kanecountystormwaterupdate.org/uploads/1/3/0/7/130775009/0684c8.pdf
    • http://files.educateachildinpakistan.org/uploads/1/3/1/4/131409200/9f8a2b6dd5d31c.pdf
    • http://files.educateachildinpakistan.org/uploads/1/3/1/4/13140920
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/23117491227.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/durewosomonimejoveseval.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/zanopuravi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/37450780779.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/74839830442.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/98412004290.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/86181681004.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/bopefoxudag.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/vunifesawanaduzolakuminar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/faluwewupirapimexefivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/62164217601.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/27919596579.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_off00008205.bin
3340ed9dfacf127d1a33cb0a9c559447ca13b691c825fb3dffc701c8dc113264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 4736 bytes
font_01_sfnt_off00009222.bin
bc4bc698f81b78d2ebdb75f089fc95cd2626444d7bf14a26c7f0f7f363e672df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9222 10792 bytes

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