PDF malware analysis — malicious · 0ddbfe2368790ee5

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 03:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2e612d277aea2dc28a0f68ab133b1d8f SHA-1: 0ed53cf0e267a7bcea97e09f07e5b51e1341abe7 SHA-256: 0ddbfe2368790ee5c6d367c6792b16df223108075f2b0be34a4a8d07db7bb742

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=varnhold%2527s+lot+walkthrough, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a game walkthrough and the authoring application, suggesting a lure. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to obscure the malicious redirector or to appear as a legitimate content aggregator. The ML classifier strongly flagged this PDF as malicious.

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=varnhold%2527s+lot+walkthrough
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/173616_3bd14b8cbb294d76b820baee37fc1e38.pdf
- https://static.usrfiles.com/ugd/a18aa6_a5afe10be5e34d42a517e63d77d312ba.pdf
- https://static.usrfiles.com/ugd/3f80ec_f5cfd45aab5b42fd82dc4e357a62d600.pdf
- https://static.usrfiles.com/ugd/5899d5_56d3037f0b2041dd9c50ff5eec182197.pdf
- https://static.usrfiles.com/ugd/b8c837_704e379a2a26416eabe240f17ddfaf37.pdf
- https://static.usrfiles.com/ugd/12f4eb_80d427f11fc74b02a761a7dad1ca4422.pdf
- https://cdn.shopify.com/s/files/1/0433/7346/1669/files/57584983360.pdf
- https://cdn.shopify.com/s/files/1/0433/0569/7438/files/71900152363.pdf
- https://static.usrfiles.com/ugd/b8c837_7a738565c1c94c32b843e4d9c72a536d.pdf
- https://static.usrfiles.com/ugd/b8c837_ef4d5570666d472f95499c01eed5264e.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_off00005271.bin` `af6f9be6ea0db45b623580d3bc50041eaca1e5161a118be3df53ae30dd34ca86`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5271	5244 bytes
`font_01_sfnt_off00006453.bin` `ab0cccf897bae04814fc98e0bb4c9c487410caa3cd225d3106b287daf90370d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6453	9828 bytes

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