Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f75d55f0891a9ae…

MALICIOUS

PDF

36.0 KB Created: 2020-08-03 07:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0c1496c5eb1324abbfb954dcd1c4fc8 SHA-1: 11edee5cbe4dc3162f8148f0b95f93a96d11ab30 SHA-256: 1f75d55f0891a9aed69426298cbae5af58ddb510ca5b4b9f6d34c00b1885d3ae
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign content on Shopify, but one critical link redirects to known malicious infrastructure at ttraff.ru. This suggests the PDF is part of a link farm designed to host and distribute malicious content or phish users. 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.ru/pify?keyword=international+model+10+grain+drill+parts
    • http://files.graceonwaters.com/uploads/1/3/0/7/130775505/domuwipepubukes-simuzuro.pdf
    • http://files.midmodcollective.com/uploads/1/3/0/8/130813841/bc994b949ddb1d.pdf
    • http://files.ustars.org/uploads/1/3/2/8/132814196/fibal.pdf
    • http://files.lifesabeautifulmess.com/uploads/1/3/1/4/131454420/rozegazuba.pdf
    • http://files.mycreativemom.com/uploads/1/3/2/6/132681969/f62286d9183454.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/cricut_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/puluweloxofa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/20023144370.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/rigagitiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/2194/3463/files/5139241379.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/34368716804.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/gudunupukogarivevavep.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/64467419914.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/mary_kay_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/16531569837.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0157/files/liwuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9435/8681/files/salekezogujikus.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/19393544362.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_off00004f09.bin
11ac85030a22553aba5ff12b0943bcba9fd9629ad6e1a3c97a8e1b1c7055ea0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F09 5412 bytes
font_01_sfnt_off00006156.bin
c36b58295a3823d6c622326644691a87b87ab78c9d043947afc4188c6f23754f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 9788 bytes

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