Malicious PDF — malware analysis report

Static analysis result for SHA-256 796a114da0f0cc5f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 20:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40903e9644c2f1d41f92e6ae8547e0ba SHA-1: 5bd41a251c795a1e670c0ac219d37a3fc33b8ae8 SHA-256: 796a114da0f0cc5ffe6acd4016bab592a82b9e48ffe10fd5420b286dc2c07abc
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially for SEO manipulation.

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=categorias+gramaticales+pdf
    • http://bewovexot.gothicwx.org/uploads/1/3/0/8/130814297/kirepitoxiwikuzepa.pdf
    • http://files.the-authorscorner.net/uploads/1/3/1/0/131070912/bonuripofi.pdf
    • http://files.cfandtg.com/uploads/1/3/1/4/131453657/52e2228.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/43107990233.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/39821407739.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/76455867455.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/bis_711.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/kilubegolapudataw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/farusabibovibumadosarobex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/schneider_electric_contactor_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/dekogobapapegisepoja.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_off00006887.bin
2842edf945b007865d3f5cf2daa042ebd7556db71eb8b7c058b2633ca583b796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 5380 bytes
font_01_sfnt_off00007abd.bin
426da7eacc2c92463c1667718978970182927ab3448949936a4cde16dcaea71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABD 11904 bytes

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