PDF malware analysis — malicious · 3f793ccea4f6889b

MALICIOUS

PDF

38.8 KB Created: 2020-09-15 14:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e84599512fae64f950a86ac47bd05be6 SHA-1: e326980084ed541e82272197a0211eb29d729315 SHA-256: 3f793ccea4f6889b2e8420322cf5251847f115e130555343ba13a8dbe142899a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Balloon tower defence 4 hacked' and includes the primary malicious URL, suggesting a lure to a potentially compromised game or exploit site. The PDF_SEO_LINK_FARM heuristic further indicates a pattern of generating numerous links, likely for SEO manipulation or to distribute malicious content across multiple domains.

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/wb?keyword=balloon%20tower%20defence%204%20hacked
- http://mufibam.summerlandlife.com/uploads/1/3/0/7/130738554/poviba.pdf
- http://lomagonok.girlscoutsu440.com/uploads/1/3/1/6/131606183/pikimolalapa-mofofodepor.pdf
- http://pikilufof.hhsclassof1979.com/uploads/1/3/0/8/130814229/lumemabegu.pdf
- https://static.usrfiles.com/ugd/2ac701_96a59a7a33734716bcac288873f8eef1.pdf
- https://static.usrfiles.com/ugd/d17951_0957db29b8b840b18b5a44e5f4ca7612.pdf
- https://static.usrfiles.com/ugd/9219f8_ae5f5f81299046be9bfc729ad0aa044d.pdf
- https://static.usrfiles.com/ugd/0a3240_d83aac31f9aa4478ad06c32712af8aac.pdf
- https://static.usrfiles.com/ugd/7f614e_8eaeb1e262a64ecb8bbce8e3d6d6c3c9.pdf
- https://static.usrfiles.com/ugd/defcb2_e1d422c71f6d41629cfcb9ef666863e5.pdf
- https://static.usrfiles.com/ugd/d9f7b5_b7cdcb9f43904f25b021da79e0133a63.pdf
- https://static.usrfiles.com/ugd/e78b77_01da12125d564e6e96ec830466b9ae58.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_off00005a19.bin` `739e7c336beef3fa820cac08809dcb31d893d0df3e0d65d3efc1d7ec1dae2bb1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A19	5224 bytes
`font_01_sfnt_off00006bf3.bin` `ad550eadc8e015cb4fc44a572f444970585d9638b7270d95c8f8442a05680617`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BF3	10128 bytes

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