PDF malware analysis — malicious · b9cb70054b8cb4ad

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 01:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c3c81199eb5a3fe8272e5f600ad52f78 SHA-1: a7370a67dc60433c8c05db283302a64a06156b61 SHA-256: b9cb70054b8cb4ad2a862f321e31b9a1ddb5ba11ec853024012dea5529e4c130

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily corrupted, contains fragments of URLs and text that suggest an attempt to disguise malicious links as educational content. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. The primary malicious IOC is the redirector URL.

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=learnzillion+guidebooks+grade+4
- http://files.julietzanniceramics.com/uploads/1/3/0/7/130776363/d09e11.pdf
- http://files.kresscinema.com/uploads/1/3/0/8/130874058/wonep.pdf
- https://cdn.shopify.com/s/files/1/0431/5942/1092/files/12647081387.pdf
- https://cdn.shopify.com/s/files/1/0431/5725/8401/files/voririlujovo.pdf
- https://cdn.shopify.com/s/files/1/0433/3905/5253/files/62005369211.pdf
- https://cdn.shopify.com/s/files/1/0430/4447/0933/files/16506331879.pdf
- https://cdn.shopify.com/s/files/1/0436/9219/5993/files/www_frys_com_rebates.pdf
- https://cdn.shopify.com/s/files/1/0430/8955/9705/files/merge_sort_space_complexity.pdf
- https://cdn.shopify.com/s/files/1/0431/2514/5760/files/kigisixigogatewetu.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/39508126125.pdf
- https://cdn.shopify.com/s/files/1/0432/4209/4755/files/wordly_wise_3000_book_6_lesson_1_answer_key.pdf
- https://cdn.shopify.com/s/files/1/0432/8967/3883/files/radial_piston_engine.pdf
- https://cdn.shopify.com/s/files/1/0439/2216/1832/files/barujexuvariroseta.pdf
- https://cdn.shopify.com/s/files/1/0434/5970/7037/files/48559106407.pdf
- https://cdn.shopify.com/s/files/1/0448/0348/9954/files/putuwir.pdf
- https://cdn.shopify.com/s/files/1/0429/8126/1466/files/gosonomafosozutetudula.pdf
- https://cdn.shopify.com/s/files/1/0438/0455/7472/files/94393379733.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_off00006310.bin` `433d82f42a15c8ad1289bdd4fd58326aeb88854c2dfac7e30ad14e8211674e8f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6310	5276 bytes
`font_01_sfnt_off0000751d.bin` `99d562ac6dac438fb49dee8a929369036b6a0c6c81685f9f69786450f4268618`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x751D	10076 bytes

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