Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1323120dc25eb0d…

MALICIOUS

PDF

48.3 KB Created: 2020-07-27 15:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b9e1f91ae7a13228d7027d0cddfc769 SHA-1: 58299291612e9860c7de95831efd4561a5dbb74d SHA-256: b1323120dc25eb0d3aa04896bd42e09b1812cb9b12882dc9653111d8e89e6d17
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'request letter format for industrial training'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on Shopify, likely to obscure the malicious redirector.

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=request+letter+format+for+industrial+training
    • http://files.edinburghh3.com/uploads/1/3/1/3/131379503/5518012.pdf
    • http://files.enterprisesgbe.com/uploads/1/3/1/6/131606467/mazuzujuz.pdf
    • http://files.mindfuldemocracy.org/uploads/1/3/2/6/132681038/tubukajelopopezodiso.pdf
    • http://files.mindfuldemocracy.org/uploads/1/3/2/6/13268
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/83589457688.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/folozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/67032285984.pdf
    • https://cdn.shopify.com/s/files/1/0434/6442/5634/files/vogefasubumolir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/donubugineropizorulumogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/sadopagise.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/fagatexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/51211781776.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/kofimebexawodafujuwano.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/55768403103.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/sufijifelif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/guwegagodamivoredor.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_off00007e35.bin
3da564539c2353ac768c6ef23471d687d9978199b3854905d056d01ed5569c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 5244 bytes
font_01_sfnt_off00008fea.bin
1ddc240c12997dcfe878dc37355597db16054468a0e19aeadf86759bea79565c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEA 10488 bytes

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