Malicious PDF — malware analysis report

Static analysis result for SHA-256 1addf65e6e3fe3ee…

MALICIOUS

PDF

52.6 KB Created: 2020-08-30 16:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f7c78d0c4f86f94cd0f39b27d6dde78 SHA-1: 229ebf1b40726f8b7b28d91bd1f64e720e1a44f6 SHA-256: 1addf65e6e3fe3ee546687fb47e6600ec3e47e4c8e87428e5110520ebf05ae07
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This link, 'https://ttraff.cc/wix?keyword=watch+the+originals+season+4+episode', is presented in a way that suggests it leads to content for a TV show, likely to entice clicks. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=watch+the+originals+season+4+episode
    • https://static.usrfiles.com/ugd/963627_f2bfd239457a4133ba00296b7406567f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b7f2b0c200b401ea62610955f037079.pdf
    • https://static.usrfiles.com/ugd/b8c837_bca5ef35811e4952ba6251077e5a66e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2150e9f0dea54ed888cc0ed45ba302a3.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/12th_business_maths_solution_book_download_english_medium.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f726ef6f4fc4e1ab773155ee955dfe2.pdf
    • https://static.usrfiles.com/ugd/1e32c2_884f41a5fa4f4aa79951b022eb7a90b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c959401c0ceb4e5ebe8ae4b67ebb1093.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb41f20180e6413098396a9da2b9956c.pdf
    • https://static.usrfiles.com/ugd/b8c837_654768dc757848ccb55b075d94197deb.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_off00008bf5.bin
2bd5bc0613d561168c015f902380c7103b01025ea1a561d230d2ff9e2555b3bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 5436 bytes
font_01_sfnt_off00009e77.bin
0b5f8d4936d1c41017d187e428a492faeab094539c15cc8cd35e90098cc8beb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E77 12260 bytes

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