Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8a813bd450e879…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 23:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ac95688f9e4820ff6c87172b295eb0a SHA-1: 6fe343261b2b4b873ff53448c8adf01a820787b1 SHA-256: ff8a813bd450e87928129d391be7437f7f955f22e659efb9596e97adb5225260
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=michelin+tyre+inflator+3140'. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a link farm or redirection tactic. The primary intent appears to be directing the user to malicious infrastructure under the guise of a product-related document.

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/wix?keyword=michelin+tyre+inflator+3140
    • https://static.usrfiles.com/ugd/07625c_14028b3ec21746d9b681a9a2abd1295d.pdf
    • https://static.usrfiles.com/ugd/b8c837_349c252372984fe9b3410c02ef022d81.pdf
    • https://static.usrfiles.com/ugd/b8c837_19193ff6550d4515858606cbe454f509.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/football_manager_2019_wonderkids.pdf
    • https://static.usrfiles.com/ugd/b8c837_762337e21b2b4b40bb75596da384d484.pdf
    • https://static.usrfiles.com/ugd/93c935_12d6c9270d6b4b048510b2dc9aa9b220.pdf
    • https://static.usrfiles.com/ugd/7c3584_cda989f160e94c5698be1ec4eedaf265.pdf
    • https://static.usrfiles.com/ugd/b8c837_a749f06352934335ae43fd715734e904.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/adjectives_and_adverbs_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/berner_oberland_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/kewoverusipira.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/firig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/cartoon_character_development.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_off00005baf.bin
72f8afaa09f360495555e677f7d2cee2f1829fb2d77848e323ba3c4b2b216e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAF 5344 bytes
font_01_sfnt_off00006ddd.bin
776a963ad9e446eba693de48849ae166b3848dcfe2fa2ea238cb6ab345b32cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 10404 bytes

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