Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d84a2a5cf480c3…

MALICIOUS

PDF

73.7 KB Created: 2020-08-30 05:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cb9e95cecead48f6dd7bf4b8b13455d SHA-1: 97ef5609b057c1f8454fae5d3bd3de7606be230a SHA-256: 53d84a2a5cf480c3a670c18fbe771061ae71f3344953539fa0b85e01ea8dd030
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm. The embedded URL `https://ttraff.ru/wix?keyword=dianne+craft+brain+integration+thera` is a critical finding, indicating a redirection to potentially harmful content. The presence of numerous external PDF links, such as `https://static.usrfiles.com/ugd/2813e2_3c72aa5c43ae48319ed8465c7b067ff8.pdf`, suggests a coordinated effort to distribute content or lure victims through a network of linked documents. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=dianne+craft+brain+integration+thera
    • https://static.usrfiles.com/ugd/2813e2_3c72aa5c43ae48319ed8465c7b067ff8.pdf
    • https://static.usrfiles.com/ugd/b8c837_127b7f64e5fe454c97d8858f93b75350.pdf
    • https://static.usrfiles.com/ugd/63022f_06483f452b6a4491970983d9e7292fbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_861f8523df4c4ac38abca19799ba8965.pdf
    • https://static.usrfiles.com/ugd/7e6083_8dc84817aa41426cbfab72dbe6dd59f8.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/wefipezunabewepegujubixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7587/8564/files/88377872709.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/54944307129.pdf
    • https://static.usrfiles.com/ugd/b8c837_053808e8de0a4b62b6f65f7f8946bbac.pdf
    • https://static.usrfiles.com/ugd/0049ca_bce64b25634b436a8902c458d3416dbb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/78596905920.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/2080_super_benchmark.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/93914441099.pdf
    • https://cdn.shopify.com/s/files/1/0434/0541/0471/files/tanazinesafo.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_off0000e4a6.bin
312faca76b13fbbde7825f29303ab46189845af82bcfed6d7d6282962b25cd99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5072 bytes
font_01_sfnt_off0000f5e5.bin
42925be4b2d9ce8e5baf709a5e7d297e037869363b0d454a0d677552f64322d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 10444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.