PDF malware analysis — malicious · afd3eb4f48d3c4d4

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 05:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0f92d2849ab2b472d84de1db59aedcb8 SHA-1: 1b42053c393716e6e6041137c97ce9af5ccec22e SHA-256: afd3eb4f48d3c4d4887e6687827ec08e2e8f2eaffc9f00cc208bc3cebc1b887e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=on+the+trail+of+the+nephilim+pdf
- https://static.usrfiles.com/ugd/b8c837_29722c605d6244a189447036c365eea1.pdf
- https://static.usrfiles.com/ugd/b8c837_1e5cf08febb645f4a86526b1eacced81.pdf
- https://static.usrfiles.com/ugd/b8c837_413166dd6e904ee78e3076911b2f31fe.pdf
- https://static.usrfiles.com/ugd/d2751c_167e2a27179a4c08803df4a1653623d3.pdf
- https://cdn.shopify.com/s/files/1/0431/5152/4008/files/article_about_globalization.pdf
- https://cdn.shopify.com/s/files/1/0428/3088/9126/files/assembly_language_step_by_step_3rd_edition.pdf
- https://cdn.shopify.com/s/files/1/0430/2723/4969/files/tibalebe.pdf
- https://static.usrfiles.com/ugd/a382ee_06672e5fc5674e268f8abcb81b06107d.pdf
- https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.pdf
- https://static.usrfiles.com/ugd/b8c837_528edf90f4e54b988b0956dccf9e278c.pdf
- https://cdn.shopify.com/s/files/1/0434/6452/3926/files/nadimirejaromagolovil.pdf
- https://cdn.shopify.com/s/files/1/0435/6197/5971/files/auditor_report_format.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_off0000660f.bin` `10a960562aafea3c4196602bceaceb2415cdfc0c4272fe9b1092802b55ce6bb0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x660F	5132 bytes
`font_01_sfnt_off00007753.bin` `ed19dfe0d9f4549fe0c449506dc7f5efad95b7e71cd7b26f762746d40104820a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7753	10388 bytes

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