Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2132df8475b7aa…

MALICIOUS

PDF

42.4 KB Created: 2020-07-31 06:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ae8969927e3f8e6e8c469e33bdae22 SHA-1: 045e3fe34e8a29462f2c462db83e8a3f8b63cfb3 SHA-256: fa2132df8475b7aaf287f4186972cef27f23f5381247ad0fe0fe409b9de30bb7
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.ru'. Additionally, it exhibits a PDF SEO link farm pattern, with numerous links to PDFs hosted on Shopify. The embedded document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for SEO manipulation or to disguise malicious content. The primary intent appears to be luring users to malicious sites through a deceptive link farm.

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.ru/pify?keyword=blank+dnd+character+sheet+pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/0/7/130775154/migirudanozivov.pdf
    • http://files.choosehealth2016.net/uploads/1/3/0/9/130969811/fitop-safawogunonix-juxokore-kulej.pdf
    • http://files.kinematicintegration.com/uploads/1/3/1/4/131438835/287e220ad0e61.pdf
    • http://files.kinematicintegration.c
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/ritadavisebativ.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/zojenituritarin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/63991413354.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/9508096406.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/daxotasumunolupebepow.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/53255944055.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/35574522046.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/68624042453.pdf
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/gusopoletosegironitikotud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/92073163772.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_off0000683b.bin
b39be17f353cc1c0838713ac92287b911a5e240a1785eb9f3f8ef2d404f249c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 4988 bytes
font_01_sfnt_off0000791e.bin
7c437e51ea4cc5e65a4ccd0f6ad4025ee607d5b326eca3e1771898c0c3ecab9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 10376 bytes

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