PDF malware analysis — malicious · 7ca192bd44d82b50

MALICIOUS

PDF

37.5 KB Created: 2020-08-29 12:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a4f93abd59d8de516fa471a368d43523 SHA-1: c6d86dff5b985e43bff56c1a2418208c3affc5b0 SHA-256: 7ca192bd44d82b50874304a833cb62c7bf814507ffc9ce00e2d38b5f183baf6c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. One of the primary links directs to a known malicious redirector. 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.me/wix?keyword=7+days+to+die+how+to+upgrade+wood+fr
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_75215d55ffe24d41beb6b5705f61ffa5.pdf
- https://static.usrfiles.com/ugd/b8c837_3c183f253f8f4238940474038910a9e3.pdf
- https://static.usrfiles.com/ugd/b8c837_6f5ea33ec6564d908efdff587d342b03.pdf
- https://static.usrfiles.com/ugd/b8c837_44cde49ef32640d2be1d6a7a6906f519.pdf
- https://static.usrfiles.com/ugd/b8c837_f68ba551c4664203a2ecacec1817c8da.pdf
- https://static.usrfiles.com/ugd/b8c837_f2a30a9a72904156b09b47f6b151624a.pdf
- https://static.usrfiles.com/ugd/b8c837_2dba0c823b7a41fc9f1d03463ff52488.pdf
- https://static.usrfiles.com/ugd/b8c837_ce25419a61c74557bba30b2c99e307f3.pdf
- https://static.usrfiles.com/ugd/b8c837_ae2353dbd8ff440390744f326616ca06.pdf
- https://cdn.shopify.com/s/files/1/0432/1089/9624/files/mujajes.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
- https://cdn.shopify.com/s/files/1/0468/1580/5594/files/telugu_novels_online_free_download.pdf
- https://cdn.shopify.com/s/files/1/0431/0669/7367/files/db_password_filetype_env.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_off000054d1.bin` `3a68a89d2696a9ea07262672ace0459126d053235fc818a6e71135d5f9acd5de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x54D1	5452 bytes
`font_01_sfnt_off00006777.bin` `7a9e55594d4ea0844ca93ba6722014b47e23c1c0cee45417a91da6f291250c74`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6777	10016 bytes

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