PDF malware analysis — malicious · 9b69be5ea4982ab0

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 17:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a87f890a644dc034dd3fd9b6b5008c84 SHA-1: b037246eacd0be38006232791fc1f6e7a69c4411 SHA-256: 9b69be5ea4982ab099c3a5ee97566129d33e7b5df1b1ac119143fa9d8a5316f8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL `https://ttraff.ru/wix?keyword=debaut+ser+banco+patagonia` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to `static.usrfiles.com`, suggesting a coordinated effort to distribute malicious content through a link farm.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=debaut+ser+banco+patagonia
- https://static.usrfiles.com/ugd/c8a981_ffa9347f5cb34a029376c30f84b02709.pdf
- https://static.usrfiles.com/ugd/271e65_90bb10162fa54b6d83ad79b9720dfdf9.pdf
- https://static.usrfiles.com/ugd/b8c837_b95716b858614aa88eb1b35794524522.pdf
- https://static.usrfiles.com/ugd/07e02c_9466d007d97c4b9486008a6cc31ea21e.pdf
- https://static.usrfiles.com/ugd/b8c837_d39ec767d9fd401c96806e6af0641ef4.pdf
- https://static.usrfiles.com/ugd/b8c837_0efc339b98e747a992879437c9e52293.pdf
- https://static.usrfiles.com/ugd/b8c837_cdc77f2aa0844d95be48d2cfbe874bbd.pdf
- https://static.usrfiles.com/ugd/cc089a_8b4a41b3eab2465e81d6c9d40ceca9be.pdf
- https://static.usrfiles.com/ugd/b8c837_b8e4ae36c5374a73b9f1ceb5e9ffd61c.pdf
- https://static.usrfiles.com/ugd/ceb2e8_7be41818d5ea408684b62712af669899.pdf
- https://static.usrfiles.com/ugd/b8c837_ad796a46abf149ef8058e49501923ca8.pdf
- https://static.usrfiles.com/ugd/87fdc7_1baab8aacb3e42fab7c2df28aad89ece.pdf
- https://cdn.shopify.com/s/files/1/0430/9978/3319/files/buzone.pdf
- https://cdn.shopify.com/s/files/1/0437/4737/7301/files/membuat_cv_lamaran_kerja.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006367.bin` `0fa45fa5ad7382f62dd66cc4b023b3d86f729c2048f4ae1da4ca3369586edce1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6367	5092 bytes
`font_01_sfnt_off000074b9.bin` `3c2669456ab9d9b7bb4810dcf930e0f518f96d29fea6ae599f357416778ea396`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74B9	10620 bytes
`font_02_sfnt_off000098b0.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98B0	4324 bytes

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