Malicious PDF — malware analysis report

Static analysis result for SHA-256 8966d4f7262c7243…

MALICIOUS

PDF

49.1 KB Created: 2020-08-05 23:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8270d376f509a4aed0fb3dd7bcedcaff SHA-1: 3166833f8e962379d01a750848e3a45f9ae4f35b SHA-256: 8966d4f7262c7243fba2ee7088c17322c9bf8dc285be1d1dfb82857403dce83b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This redirector is likely used to obscure the final destination, which is probably a malicious payload or phishing page. The document body text, though partially corrupted, mentions 'understanding and using english grammar betty azar pdf download', suggesting a lure to trick users into clicking the malicious link.

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=understanding+and+using+english+grammar+betty+azar+pdf+download
    • http://files.braincarelaw.com/uploads/1/3/1/3/131380842/3170894.pdf
    • http://files.perennialplanters.org/uploads/1/3/0/8/130814106/7651816.pdf
    • http://files.salsaritaslexky.com/uploads/1/3/1/4/131407898/9916121.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/bokotipowelize.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/memubefurojalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/sekugusufokunameku.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/neratobizulawezivup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/27545062337.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/82859534355.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/mudogusuziwufor.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/winchester_model_290.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/motorola_surfboard_sbg6580.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/11973681135.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/mipawamexerememipukogepoz.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_off00007368.bin
705d5dc3cec6ed59d6e2e7d97d087c2222ff55ea20a27ec4006e1290c06c0e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 5832 bytes
font_01_sfnt_off00008733.bin
64867de0b6185b01e1c227b919bf0112dae3188a2dc8e2b72abed70c80a01776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 16800 bytes

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