Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16139dd64ea42b7…

MALICIOUS

PDF

48.7 KB Created: 2020-08-08 16:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40911e65253debd05d3079c4d3478d87 SHA-1: ca4fa3c46d65d3a61dc4f7ae6221f8d90857ef49 SHA-256: e16139dd64ea42b7be5ef751b76c88d8cf73501381369981aef05a623182fc12
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=negritude+movement+pdf`. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/pify?keyword=negritude+movement+pdf
    • http://files.tbcmarshall.org/uploads/1/3/0/9/130969061/8429106.pdf
    • http://files.teachersfortomorrow.net/uploads/1/3/1/6/131606789/sisifoso.pdf
    • http://bigegu.t3wellness.com/uploads/1/3/1/3/131380429/6b8b7410.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/children_s_catechism.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/435965131.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/riwiboris.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/nujuwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/21977778440.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/60531933912.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/bujimuxekepovisiduberupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/wabuxakuditetovarawabin.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/16770934132.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/zunokedigesiputifoxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8218/files/41063493151.pdf
    • https://cdn.shopify.com/s/files/1/0439/5663/3758/files/photoshop_tutorial.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_off000081f4.bin
b812a7a1292653b7ea926d04a61db95c70bb187fa7324e36649c689118d5c9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 4968 bytes
font_01_sfnt_off000092dd.bin
b627d0bc4d0de4d83da29c0eaae3ec2e8ebe16b32bc4fb51a3c3dffe8e3dbd26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92DD 10224 bytes

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