Malicious PDF — malware analysis report

Static analysis result for SHA-256 95be43eeece12dcc…

MALICIOUS

PDF

43.0 KB Created: 2020-08-28 22:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 639ba9864df5976ef83409cc78cba8be SHA-1: a731e5abec347ae89b8859680ded01e80ad8f97e SHA-256: 95be43eeece12dcc7b7929a8e9065c962b7664bb3969bf0fef0d7adf1ba85635
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=delta+green+countdown', is flagged as a known malicious redirector. The document body is heavily obfuscated but contains this URL and others, suggesting a lure to external content. The primary attack pattern appears to be a form of SEO manipulation or a redirector chain to malicious infrastructure.

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.com/wix?keyword=delta+green+countdown
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/command_line_tools_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/relopunijupijateruxunavoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/thyroid_hormone_metabolism.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8353486f17742b387d5f83487f42cb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a242ddfb664530a6fc47c840efeb9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b281b7a1174926accdf296b76d35f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_86fd3b4a1b0e47df8cd87c2ef50731de.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde90f7483ef46718d6fc682b1c3613f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ab7b7970844811aeeabe7b5dd323dc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/lepejofosojagobi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/38747411332.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_off00006b99.bin
d893c45fa75a607be09cb0d9cf29926d16ffe2c5fcc2336559433988fa9faaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 5020 bytes
font_01_sfnt_off00007cc5.bin
e67d5e53e6714046d48cf2a14d17cca08a3f1289d4e7c2ec9d5abd6e4107656d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC5 10144 bytes

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