Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ecd1f63efd646b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 21:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b37c9b8795c197127b3b6aafa0eee1e SHA-1: 3e8b911076ba7d4576b9fe98e29dd5572cc7185d SHA-256: d5ecd1f63efd646b3d9397482fc78d68760d4337fa4fefb8daa23ef68b58d986
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as ttraff.com. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ttraff.com, indicating malicious intent. The document body, though heavily obfuscated, also contains the URL https://ttraff.com/pify?keyword=ampas+kelapa+pdf, reinforcing the lure. The presence of numerous Shopify links, while some are confirmed benign, suggests an attempt to blend malicious links with legitimate ones.

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=ampas+kelapa+pdf
    • http://vemefowol.wellsviewcottage.com/uploads/1/3/1/0/131070450/8401904.pdf
    • http://kemekukaf.crookstonpetclinic.com/uploads/1/3/2/7/132740285/103a03a69.pdf
    • https://cdn.shopify.com/s/files/1/0440/7325/5062/files/xejosukoguburixaviwogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/hickman_zoology.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/alain_deneault_mediocrity.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/coronado_islands_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/conceptos_tradicionales_del_anlisis_econmico.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/zevam.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/gujajin.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/97674202483.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0503/files/mini_international_neuropsychiatric_interview_7._0_french_version.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_off000063f0.bin
a40b5cccf743ef82ab15e7132678d474e86262146625a6de84c41ba5e07cafc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5144 bytes
font_01_sfnt_off00007564.bin
929b5eb8c5ca283db2a922a6f72e74a754c201769dc77df800602ffd3134e427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 10628 bytes

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