Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6cff892dab299a…

MALICIOUS

PDF

41.7 KB Created: 2020-09-06 15:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1751e208519f5e3dfd1ea37df03463b1 SHA-1: a227eb42422b90b962b35f7d27cb83556803a0a7 SHA-256: dc6cff892dab299abe4599a56a6949745148a6a9e6469db7cca04b69c4844a26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF file contains a heuristic firing for a malicious redirector link and a browser extension installation lure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to trick users into downloading malicious content, such as fake browser updates. The primary redirector URL is https://ttraff.link/pify?keyword=google+chrome+version+74++64+bit, which likely leads to a further malicious download.

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.link/pify?keyword=google+chrome+version+74++64+bit
    • https://cdn.shopify.com/s/files/1/0440/7869/4565/files/52606204095.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/59181007439.pdf
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/37001185894.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1301/files/newer_antianginal_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3510/files/litujodafegunuganipakano.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/cuentos_cortos_en_ingles_para_nios.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ff0ee1f36d64f2fbaceadfb46ec0898.pdf
    • https://static.usrfiles.com/ugd/83d902_c01894bfd4b8468691873fd5decae929.pdf
    • https://static.usrfiles.com/ugd/6908d7_a1ee39f259b34f05932fa965c92e8fde.pdf
    • https://static.usrfiles.com/ugd/dc98cc_2cf2a61a21d24180b81d5c6f5b7e3ead.pdf
    • https://static.usrfiles.com/ugd/1df9ea_405d95df56f54af8b820edde73b9a163.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_off00006254.bin
1aaca239b9bab35043e06984dbba74c768a7099c709ea17c707a2f5ab3f0791e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 5556 bytes
font_01_sfnt_off0000752f.bin
f8a8d19a7c6511b0844b9f0a5f6bfb820eb591c1905b6e7b3a0b322615e171d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 11008 bytes

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