Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4088d70759b5bbf…

MALICIOUS

PDF

45.1 KB Created: 2020-08-18 22:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5168655db96988ede116269e6339524c SHA-1: e990a56576b90a3273d0ddd672d7af5954155c00 SHA-256: c4088d70759b5bbf12d1106978e29dccde7a68daf5e39ffbbd4b81d8f84b87b5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the extracted URLs, 'https://ttraff.ru/pify?keyword=grim+fandango+remastered+trophy+guide+and+roadmap', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to blend malicious links with seemingly benign 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.ru/pify?keyword=grim+fandango+remastered+trophy+guide+and+roadmap
    • http://files.chhspiratesband.org/uploads/1/3/1/4/131437584/gesokos.pdf
    • http://zofukuje.portlandumc.org/uploads/1/3/1/3/131380181/tineked.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/california_state_university.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/50296171100.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2238/files/roman_catholic_catechism.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2674/files/21013436158.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/52863029898.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/56991135259.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/wofebovotifozobamulekaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/59209220588.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/19863676395.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/initialize_2d_array_java.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_off000070e3.bin
b38d938e8f2c0a353ab735273013204acc4a9365789b5b804c506f0cacc81cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 5556 bytes
font_01_sfnt_off000083a5.bin
c817cef7e2834a135cfbe313f6068f8628c1a515bccfa709924a304355f178c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A5 10420 bytes

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