Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3b738d9c89cd0c…

MALICIOUS

PDF

33.8 KB Created: 2020-08-05 06:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6165d4b41c241d1fdbc44b37444a4d58 SHA-1: 4da2e0594a5039021271d6bd47b76aee655630c0 SHA-256: 3a3b738d9c89cd0ce00a3ac2a2a8e85de1db4e0a089ec7b2c00b74a5c9ecb7e2
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, which points to 'ttraff.cc'. This URL is designed to lure users into downloading a PDF, as indicated by the 'microservices architecture book pdf download' keyword in the URL. The document body also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or download lure tactic. The primary malicious IOC is the redirector URL.

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=microservices+architecture+book+pdf+download
    • http://files.kornstad.com/uploads/1/3/2/3/132303061/sebila.pdf
    • http://files.hampsteadpujacommittee.co.uk/uploads/1/3/1/4/131437254/koneboderawuja.pdf
    • http://files.jojoamo.com/uploads/1/3/0/8/130874514/zugosadanejasu_japal_rokuxarukitum_gifevudate.pdf
    • http://files.luminous-studios.us/uploads/1/3/1/4/131453194/4654718.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/mebapilaxiletigafozila.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/nobejetin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/zikitetijakepilexawetizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6050/2421/files/15394994310.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/revepamofudaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/kivini.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/orioles_2020_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/penguin_reader_level_5_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/57339060499.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/college_of_glamour_bard.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_off00004697.bin
2716c141f7171c36b7f33aad93c38c55b5ae2a1edfed4e225a2c1f7972510d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4697 5604 bytes
font_01_sfnt_off000059be.bin
b4de4e4000f982d87887df4a59682e14e17c47bc1204cc9fc6716f57ecc47e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BE 9532 bytes

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