PDF malware analysis — malicious · 5c90a3b4eaa9d438

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 15:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 72f77392c92ebfca4da0828d84759580 SHA-1: 30cb63cb1e19e1e7900b75ffa004e4c1a200e56e SHA-256: 5c90a3b4eaa9d43888131688c1e1b69c5ca6ce9543b94a86cb3984218c79b237

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a link farm infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=high+gloss+sheet+vinyl+flooring, which is flagged as a known malicious redirector. The document's structure suggests an attempt to disguise malicious activity as a legitimate link repository, likely to trick users into visiting harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=high+gloss+sheet+vinyl+flooring
- http://files.bridgeportpta.org/uploads/1/3/0/8/130814926/xewutuxolazexolosal.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/1104/6558/files/uspap_2016-_2017.pdf
- https://cdn.shopify.com/s/files/1/0433/2702/9400/files/sexikinid.pdf
- https://cdn.shopify.com/s/files/1/0430/5115/5618/files/25363028366.pdf
- https://cdn.shopify.com/s/files/1/0433/6621/9941/files/84752037639.pdf
- https://cdn.shopify.com/s/files/1/0432/7093/0600/files/how_to_update_a_minecraft_server.pdf
- https://cdn.shopify.com/s/files/1/0434/5964/1496/files/13804232218.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97242885008.pdf
- https://cdn.shopify.com/s/files/1/0434/0894/9402/files/minions_songs_banana.pdf
- https://cdn.shopify.com/s/files/1/0429/8558/6841/files/10920411835.pdf
- https://cdn.shopify.com/s/files/1/0432/9324/5590/files/66798965057.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005df4.bin` `3017e1d0b7456c449b231ac330e362814b01e05d99ce1a148d1c98790e6cefb7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DF4	4944 bytes
`font_01_sfnt_off00006ecd.bin` `ff49e0d9b85d452704640b670f475df62af743e94cf3d0fdcb8a4a9cba847b3c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ECD	10216 bytes

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