PDF malware analysis — malicious · 2ef67cbe5a38f227

MALICIOUS

PDF

34.5 KB Created: 2020-08-17 15:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 97885f1d9f577e02138fed5cbd5a22c2 SHA-1: 7c614cc8c444b6d8c34a5d8754deea6924ee9b92 SHA-256: 2ef67cbe5a38f227ed4b1c384c4d60861ac2cb4aab8cb4672215322db2c520e9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to alphabet worksheets and a URL that matches the malicious redirector. The presence of a large link farm, with many links pointing to Shopify domains, suggests an attempt to obscure the malicious destination. The primary malicious URL identified is https://ttraff.com/pify?keyword=upper+and+lowercase+alphabet+writing+worksheets.

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=upper+and+lowercase+alphabet+writing+worksheets
- http://files.tell-ignite.com/uploads/1/3/0/7/130739308/vizerag.pdf
- https://cdn.shopify.com/s/files/1/0428/4642/1158/files/discord_markdown_strikethrough.pdf
- https://cdn.shopify.com/s/files/1/0429/9846/4661/files/nesolajomutafijezu.pdf
- https://cdn.shopify.com/s/files/1/0432/2597/2904/files/54384831962.pdf
- https://cdn.shopify.com/s/files/1/0438/8411/8171/files/32121836735.pdf
- https://cdn.shopify.com/s/files/1/0440/1332/2398/files/wixiraroxa.pdf
- https://cdn.shopify.com/s/files/1/0428/5205/7244/files/tanh_activation_function.pdf
- https://cdn.shopify.com/s/files/1/0431/1734/6976/files/59881125691.pdf
- https://cdn.shopify.com/s/files/1/0438/9991/2344/files/slope_intercept_form_real_world_problems_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0430/2661/2378/files/proponents_of_rational_choice_theory.pdf
- https://cdn.shopify.com/s/files/1/0435/2281/8200/files/dinanapozamitawive.pdf
- https://cdn.shopify.com/s/files/1/0439/9605/3662/files/22219847086.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
- https://cdn.shopify.com/s/files/1/0428/9137/8854/files/40794755426.pdf
- https://cdn.shopify.com/s/files/1/0431/0990/8637/files/67839969728.pdf
- https://cdn.shopify.com/s/files/1/0432/9055/8622/files/dinewurenorezimub.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000480f.bin` `15ecb699fbb4fb95258a6d86c67707b5cf9fd0e962fa97e55eda928e78541aa2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x480F	5624 bytes
`font_01_sfnt_off00005b30.bin` `8fd1493963423755a9411feb3023270983c215ab0791bfd0e577ba9127da562b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B30	9756 bytes

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