Malicious PDF — malware analysis report

Static analysis result for SHA-256 4932a01ef7d865ae…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 02:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993c30007b76175291b68b88767217e6 SHA-1: 8a546a8b71290bbba83e8e8bd3f634dd93fc0424 SHA-256: 4932a01ef7d865ae5d2706cc144f0d60b66fc1ef16234c219adefe7154f60d59
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The PDF also contains a large number of embedded links, many of which are generated and potentially used for SEO poisoning to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.com/wix?keyword=pumpkin+patch+northern+ky
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/beturewasagisazevamuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/kalnirnay_feb_2020_marathi_calendar_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/poxolijepasit.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2e4ea4c537e4aed807f9165405a8193.pdf
    • https://static.usrfiles.com/ugd/b8c837_528edf90f4e54b988b0956dccf9e278c.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a277fea62c494f8fa2f190366ff8c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b723ca448249d7b193bc810be51e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcca063b45c240baae00c600f19fdf43.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfcda2e4e5bd4a3d8b7503cf0da89f99.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a1d658857f4d34893b47ea1a85923e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d46dfc5edf7f4833a626abf19ee6e198.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_off00006806.bin
a87d0bc1b73dd5d4a136dca9338cfa79c722cb682ba373b516b5591f81cd2285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5132 bytes
font_01_sfnt_off0000794d.bin
bee6b7aa25503bc5ff6a4b93dfd72c7d7b971789c942d732e29dcc048dde35eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794D 10260 bytes

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