Malicious PDF — malware analysis report

Static analysis result for SHA-256 266becf9d42282a5…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 03:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12eb95627fce77126ae5fbc2d3f6d773 SHA-1: b56bc3ab5718aca7a4c9390345d9cf5c4a9aea43 SHA-256: 266becf9d42282a56824237d79d4cbaf66cb948dd63e2f48429645c5aff56a06
140 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating a document signing service, likely DocuSign, to trick the user into clicking a link. This link, 'https://ttraff.com/pify?keyword=google+sheets+to+google+docs', redirects to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to host further malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector link.

Heuristics 4

  • 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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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=google+sheets+to+google+docs
    • http://files.sbjc.org.uk/uploads/1/3/2/6/132681772/5733905.pdf
    • http://files.the100dayproject.org/uploads/1/3/1/4/131407284/nuzurejoz.pdf
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/jitunavujetepegepulopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/60974081167.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/janimiwedujewefesujij.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5754/files/xipofexipeviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/13194055792.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/probability_density_function_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/video_cutter_joiner_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/78820986233.pdf
    • https://cdn.shopify.com/s/files/1/0460/8144/1956/files/jetotowovugilafajulagi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/fodavulaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/wozumazejirisibilaxunij.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_off00006423.bin
710ae57b79bdc179f9ea7c872fdfafafd5662412046846be8601c6aca0f5d7b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 4928 bytes
font_01_sfnt_off000074e7.bin
f5c80467462046b1140fb071d6e969bb79322e2986059a3ab27c56c5da9597c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 10008 bytes