PDF malware analysis — malicious · ea4a28824bf762cc

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 17:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2fa4348fc998a872b9edbff2be3364d SHA-1: 87d8fe0276cd3add313125d0b312840ab53b7210 SHA-256: ea4a28824bf762ccaecf57b0243ad1ccabd568e5d8d60b8b6e71c1a3a8d5a3c1

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.ru/wix?keyword=tatuajes+de+perros+yorkshire. This suggests the document is a lure, likely intended to deliver a second-stage payload or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=tatuajes+de+perros+yorkshire
- https://static.usrfiles.com/ugd/4bdc6d_db1caefaec1c425c8eb19a645812d21c.pdf
- https://static.usrfiles.com/ugd/b8c837_c2cdf11cf77d41e495478a8651f93925.pdf
- https://static.usrfiles.com/ugd/99a8f2_2d243becc84f473098aafc43324e4f48.pdf
- https://static.usrfiles.com/ugd/e2b09b_1f491e6729f3462bb790e626cb723211.pdf
- https://static.usrfiles.com/ugd/c5d40f_7f8ff22506bb4470b68c3eb7b814c99a.pdf
- https://static.usrfiles.com/ugd/b8c837_cd3f95ba995a49a2a565c577aa25e4a4.pdf
- https://static.usrfiles.com/ugd/10e3af_9e7addf1d9da49fc95225901a58ec0a1.pdf
- https://static.usrfiles.com/ugd/b8c837_1cca151932c04f19ba94db3104cbf18e.pdf
- https://cdn.shopify.com/s/files/1/0459/8697/1815/files/teamviewer_12._0._95.pdf
- https://cdn.shopify.com/s/files/1/0431/6830/1212/files/jodis.pdf
- https://cdn.shopify.com/s/files/1/0432/8334/9668/files/pirajusagub.pdf
- https://static.usrfiles.com/ugd/19103d_ada491408b844503a1464cd8f5935cbd.pdf
- https://static.usrfiles.com/ugd/b8c837_d5c930cd192341068dc5cb433cd6616b.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_off000060a9.bin` `9f4a473ebf41bd973240dd2eb7099232f118caee4362c465f1ea4c48ed99f1fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60A9	5204 bytes
`font_01_sfnt_off00007263.bin` `500be7e9691474f30e3e5b289228e4b6576a3517cac12384d15866625edde58a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7263	10672 bytes

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