Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8c566c1cfc941f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-25 03:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa08e72584661a7784cb5479a21282d SHA-1: 4d90f93d205a783ab173f4f0e1eb8f11af1d9e88 SHA-256: aa8c566c1cfc941f1ae6023cab6104e5f6840fbc2373afcadc4c1b9ece883156
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external PDF links. One of these links, 'https://ttraff.ru/pify?keyword=k+t+c+full+form', is identified as a known malicious redirector. The document body contains obfuscated text and the same URL, suggesting an attempt to lure users to malicious content. The presence of a link farm and a malicious redirector indicates a phishing or redirection attack.

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=k+t+c+full+form
    • http://files.loenerhof.com/uploads/1/3/1/6/131606261/4891409.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/85721721675.pdf
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/formal_channels_of_communication_in_business_organization.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/wepebopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6151/0293/files/yowhatsapp_2018_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/godoviverixafenulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1257/files/ralewovelodonekip.pdf
    • https://cdn.shopify.com/s/files/1/0463/4725/5970/files/mewaninanakeretaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/18861350136.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/sogute.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/63752643074.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_off00004f94.bin
07d03263e71365b020e1ebdb393b24dc51bce7f02b738744c1dd7082328c2ccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F94 4608 bytes
font_01_sfnt_off00005f25.bin
3691e01b984c8d12ea5309b241cee85e13b8ef0087caca001a25c4f7f6a773a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 9912 bytes

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