Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6602aa7ca03aca6…

MALICIOUS

PDF

44.2 KB Created: 2020-08-04 05:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b7afe1ef1110a6f288050b13fb5abd SHA-1: 3f77589ba32d3ed7e05b97f0f3294d26bf92fa76 SHA-256: b6602aa7ca03aca6f88ff09c98edfd229b4b425ec229d25b8a64e8299869a0cc
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating an attempt to generate traffic or distribute content through numerous PDF links. The document body contains the text 'Aha cpr 2020 pdf', which likely serves as a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious 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=aha+cpr+2020+pdf
    • http://webuxu.gocprny.com/uploads/1/3/1/3/131379012/455f25b.pdf
    • http://files.thijmendoornik.com/uploads/1/3/1/4/131454126/povaj_wavulavakamevi_mexos.pdf
    • http://files.themovementbasics.com/uploads/1/3/2/6/132695455/gajijozof.pdf
    • http://files.richmondhillnaturopath.com/uploads/1/3/1/3/131398010/42cd1a.pdf
    • http://files.bryanstationlacrosse.org/uploads/1/3/0/7/130739625/tekotas-purusatulazew-biwudos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/67556603674.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/zedexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/jukewefiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/jotodoninidimitani.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/59077651102.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/word_problems_on_addition_and_subtraction_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/61564776032.pdf
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/jomuraxemilamobasabuxipuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/dukapozebatow.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_off00006fb1.bin
e10b0c193f8ce173a41defafe381867fdfd9ce7cb6ac410ac2487b139202f518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 5296 bytes
font_01_sfnt_off000081b4.bin
5c2e91da0442f43b8bce2c0bd9093f0ebb65d26ac87907db11d7078e3545ee4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 10184 bytes

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