Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5543bbd8c27993…

MALICIOUS

PDF

33.2 KB Created: 2020-08-23 00:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b88ba0c15486da5fa5cd0723fee9f06 SHA-1: 238552dc9f06b139efb251b828e6794399b7fa15 SHA-256: 8f5543bbd8c279938caa54f814ea481b96d7924da7afeab5a9130afa19a6e8bd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, specifically `https://ttraff.cc/pify?keyword=renaissance+and+reformation+timeline+activity+5`. Another heuristic flagged the document as a link farm, containing 20 external PDF links, many of which point to potentially untrusted domains. The document body itself is heavily obfuscated but contains the same URLs, reinforcing the malicious intent.

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=renaissance+and+reformation+timeline+activity+5
    • http://kafevetep.comicstripmatinee.org/uploads/1/3/0/7/130775172/dopasezawexufopum.pdf
    • http://files.lordbassenterprise.com/uploads/1/3/1/4/131482950/6d53b08.pdf
    • http://tuvasi.harriscreekpta.com/uploads/1/3/1/4/131412290/5423395.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/wifislax_tutorial_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/92688925193.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/352770276.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/makovaxosevofasan.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/nutritional_benefit_of_breadfruit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/definicion_etimologica_y_formal_de_logica.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/balejugazarakifitibarubug.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_off0000436f.bin
4e8a6323b5307eb683f9674dd1d481a88bf5848969896c29ac8840c21ed2a7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x436F 5460 bytes
font_01_sfnt_off000055f7.bin
f91c2c0902f7493a7f4c037cf7ff9d42051cf6f5aceb12189d02da44aef0e3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 10064 bytes

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