Malicious PDF — malware analysis report

Static analysis result for SHA-256 c573cd75b55cc446…

MALICIOUS

PDF

38.6 KB Created: 2020-07-31 08:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b7070ce536517ae92dad4131f2ce83 SHA-1: b97b2d3e9ace4fb692edf2d1f11957b378179f12 SHA-256: c573cd75b55cc446a68234e079aa4190eee4b5ff57df37f92be3230e25e8b2e1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is designed to lure users into potentially harmful content by disguising itself as a math textbook PDF. The presence of a large number of external links suggests a link farm or a mechanism to distribute malicious 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.com/pify?keyword=math+20+precalculus+textbook+pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • http://files.krisrunstheplanet.org/uploads/1/3/1/4/131452961/2261247.pdf
    • http://files.rctduplicate.org/uploads/1/3/0/8/130873736/9927405.pdf
    • http://files.rocktogemjewelry.com/uploads/1/3/1/4/131438086/1e3090a.pdf
    • http://files.mossfrogoutfitters.com/uploads/1/3/1/4/131407274/4420496.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/sexal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/nozogufotasaxedisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/vugemasufewepojadakosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/nenenurefex.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/66865659577.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/79444471368.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/jesosesali.pdf
    • https://cdn.shopify.com/s/files/1/0440/5005/5318/files/15895792252.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/daluveruvojuxufetikamize.pdf
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/bonuxopamozumibakezade.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/tevapojoremofakexakos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/ginaforerawosexoxo.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_off00005806.bin
f69bd20a675057e11d7544f93846b7da48b4289d6e5eff4f518582d6fa454072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5806 5520 bytes
font_01_sfnt_off00006ae0.bin
d54d3b575d217478fb4196439347e50662a9eefdf4ae5c41142c6cc37255b0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 10432 bytes

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