PDF malware analysis — malicious · ad523c6a827797f1

MALICIOUS

PDF

51.2 KB Created: 2020-10-31 04:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bce16c4f4c582278bb17231cc74e2612 SHA-1: 79bc46036073f5a25832b765b71bd04d6c336586 SHA-256: ad523c6a827797f1027a9b5f854cc0396359c2e03ab9624ddae8441ccec34e5e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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/123?keyword=carmen+lugo+filippi+importancia
- https://cdn-cms.f-static.net/uploads/4406782/normal_5f97b27348979.pdf
- https://cdn-cms.f-static.net/uploads/4413474/normal_5f962826993eb.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0502/1188/1136/files/datukuvanap.pdf
- https://cdn.shopify.com/s/files/1/0268/7713/2992/files/merebebizaziwibepijaj.pdf
- https://cdn.shopify.com/s/files/1/0504/1772/9696/files/xavawedavekobud.pdf
- https://s3.amazonaws.com/zirojopemup/93668146285.pdf
- https://s3.amazonaws.com/susopuzupure/27272508187.pdf
- https://cdn.shopify.com/s/files/1/0504/5393/8366/files/femavimigumamalawo.pdf
- https://cdn.shopify.com/s/files/1/0463/1134/2242/files/84139583937.pdf
- https://cdn.shopify.com/s/files/1/0478/1257/5391/files/89282713902.pdf
- https://cdn.shopify.com/s/files/1/0500/8742/8291/files/ley_de_conservacion_de_la_materia.pdf
- https://cdn.shopify.com/s/files/1/0504/1949/9184/files/93858203829.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_off00008988.bin` `a16d957bc2511f9efe2ca658a69e2031117bebc035bdb2f8e8c14d11725059cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8988	5060 bytes
`font_01_sfnt_off00009aae.bin` `bce085197837e22e7503917dc71c42eabb3e7280b8ee59706a73961ac3af1178`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AAE	11888 bytes

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