Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7e03817ed1451a…

MALICIOUS

PDF

54.2 KB Created: 2020-08-11 09:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 964f0e28ec6822e3e274dd37ea1d9db7 SHA-1: 79252f216a4b7708d83f50ffc22f898fad77cde6 SHA-256: 4b7e03817ed1451aeb554530a1e8897f343d137deffc9b1eae50fcedc0fe3415
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Android developer tools tutorial pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.cc/pify?keyword=android+developer+tools+tutorial+pdf, which is likely used to redirect the user to a further malicious destination.

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=android+developer+tools+tutorial+pdf
    • http://files.thewoodroom.co.uk/uploads/1/3/1/1/131164488/sogopewajabadujug.pdf
    • http://files.comoxmobilemassage.ca/uploads/1/3/1/4/131437380/8790015.pdf
    • http://files.saynerstgermainfishandwildlifeclub.org/uploads/1/3/1/4/131437535/3612493.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/78825218084.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/ce2252_strength_of_materials_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/69070654095.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/wowixibugosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/sudoguditegato.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/kabarakawovoba.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/vobabebusuve.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/convert_perl_to_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/cisa_certification_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/ligeramente_peligroso_mary_balogh_descargar.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_off000095ce.bin
1cd35ae4f893c739f1fde51a9ee865d367debb1aea84323e89ca7a5282c8be7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CE 5084 bytes
font_01_sfnt_off0000a72d.bin
b0a679782d6bee8ebe93b563d154697f6bdfd2b88952fa50ce284e8d399082c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA72D 10840 bytes

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