PDF malware analysis — malicious · 336b05d853c8736c

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 08:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c80c2ffb4c151b5ef6c42bf0ba1cc6d4 SHA-1: 79323a9d4b5f73d6a91e5ca3f04596937d15aaae SHA-256: 336b05d853c8736c3490fb5657d3a70d0e29a9913402fc45e8219d299c0c2d0b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ark survival evolved apk free download' and the malicious URL. This suggests the document is designed to trick users into downloading potentially unwanted or malicious software by masquerading as a game download link.

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.cc/wix?keyword=ark+survival+evolved+apk+free+downlo
- https://static.usrfiles.com/ugd/b8c837_31e591a6907047dc93217a5834b16001.pdf
- https://static.usrfiles.com/ugd/b8c837_199c734009f14e2691292fb939ba79cd.pdf
- https://static.usrfiles.com/ugd/b8c837_179209e83ce24ee09f428c79ba82157d.pdf
- https://static.usrfiles.com/ugd/b8c837_664249c81da44ab2969ba9e06293e833.pdf
- https://static.usrfiles.com/ugd/b8c837_60ea1bff23664044a014429b477a79b6.pdf
- https://static.usrfiles.com/ugd/b8c837_a2a807880bc94fa796a6c93447feb93f.pdf
- https://static.usrfiles.com/ugd/b8c837_cb769285c4624467854aa2698f3e9b58.pdf
- https://static.usrfiles.com/ugd/b8c837_1911f57d0ddd4f9b9440b3bd90669a05.pdf
- https://cdn.shopify.com/s/files/1/0427/8039/3639/files/babenofativaged.pdf
- https://cdn.shopify.com/s/files/1/0429/7146/3831/files/zegewemalegubot.pdf
- https://cdn.shopify.com/s/files/1/0434/4637/0471/files/cutaneous_anthrax.pdf
- https://cdn.shopify.com/s/files/1/0435/8687/9647/files/62243459669.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_off0000631c.bin` `efb4602f399a1a62dd4b500d9d915b7af7e65e76d05090616c8ea4f78b9bd319`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x631C	5240 bytes
`font_01_sfnt_off0000751a.bin` `a55bf8f003a30d56866f182216d62dfeaa5f13451d1cde11053553ef494eb434`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x751A	10524 bytes

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