Malicious PDF — malware analysis report

Static analysis result for SHA-256 466f88816e3fbe58…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 13:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b415a402c28a6011287d5447a9f4ae19 SHA-1: d2fc08e586c57ea50256065bcdccdc8830716a4c SHA-256: 466f88816e3fbe584e261dc31a7add1f96d625f373b287eb18b92a5a9817674d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'fancy cursive handwriting worksheets' and the malicious URL, suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, likely as part of an SEO link farm to obscure the malicious redirector. 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/pify?keyword=fancy+cursive+handwriting+worksheets
    • http://rupofudol.jamestruslerphotography.com/uploads/1/3/2/6/132681670/makojokekedu.pdf
    • http://files.atabeira.com/uploads/1/3/1/4/131437276/86657c.pdf
    • http://files.sabasphotography.com/uploads/1/3/0/8/130873794/xuritudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/lenejokikope.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/kofizakul.pdf
    • https://cdn.shopify.com/s/files/1/0440/5359/4277/files/11941443225.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/35497848969.pdf
    • https://cdn.shopify.com/s/files/1/0431/1836/2781/files/basics_of_computer_and_applications_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/sifixuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/45881297014.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/fakuzajiranazos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/zaluwesuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/98021893374.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/rimadesozuvumofagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/sibubo.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_off000061f2.bin
5a8aaef3ba14fd84732e9fc7a7d9ed856fbefd73d7ae120cda3157e7a64a8792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 5440 bytes
font_01_sfnt_off0000748c.bin
9f23a50239adbf3ab6d0686d0642c0f239bf817b106486960fa8b754cd1c3598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 13224 bytes

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