Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6097c2bc75c63a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 05:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b984233105da54ae2c078f316fd90f SHA-1: cb4407637fc3a2428e5a50a66fe654767c80b23f SHA-256: 8c6097c2bc75c63a97d5779231b099d9f6d4ca7c7680fdd82613ea10f7ea3409
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics, suggesting a social engineering lure to install a browser update or extension. The primary IOC is the malicious redirector URL.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=chrome+for+windows+server+2012r2
    • http://files.lyndoncab.com/uploads/1/3/0/7/130738559/4163435.pdf
    • http://files.feedinc.net/uploads/1/3/1/4/131437306/bekiliko_devaroposida_xanaw_vekisigal.pdf
    • http://files.lyndoncab.com/uploads/1/3/0/7/130738559
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/30512530582.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/skyrim_porn_mod.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/cbr_test_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/47548136164.pdf
    • https://cdn.shopify.com/s/files/1/0448/0283/4594/files/buzzed_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/food_chemistry_experiments.pdf
    • https://cdn.shopify.com/s/files/1/0434/9234/3970/files/lekabiruloboxubadutikamax.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/mazalugexutusebof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/eecs_workload_survey.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/powelivul.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_off0000649f.bin
ca9e01441168d482330c96b7a9e95a6fc31ebd6a04878b1b05fb06d377e3a628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 5288 bytes
font_01_sfnt_off0000769f.bin
b8085ad4aadef58c7cb3df4a75c6a8c16b9f58b2334ec7568433311c91cf72ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769F 10164 bytes

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