PDF malware analysis — malicious · e0a115edb55cfe0d

MALICIOUS

PDF

52.3 KB Created: 2020-09-06 08:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 008cdfbabad8041638b37a78e5e7a4a4 SHA-1: 1a04e5734d987f9dde79c0229cd93fdde2435b86 SHA-256: e0a115edb55cfe0d7f7842bc0d912bbbedff331a0db02c0a39129e659b1949d5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Up agriculture online form 2019' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

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=up+agriculture+online+form+2019
- https://static.usrfiles.com/ugd/e2c250_9e563d4730ee4b9e816d7cafcf171b04.pdf
- https://static.usrfiles.com/ugd/7f929b_a2caa88ead104e9bb8340c03a7138327.pdf
- https://static.usrfiles.com/ugd/a01749_a01feee9799746ca80409f35db4b3f43.pdf
- https://static.usrfiles.com/ugd/834936_2271554bb11c4b40a142e4ce16105ee8.pdf
- https://static.usrfiles.com/ugd/b8c837_015a73c995244b06aa1f950515001515.pdf
- https://cdn.shopify.com/s/files/1/0435/6590/8123/files/bunarig.pdf
- https://cdn.shopify.com/s/files/1/0433/6232/0536/files/68122520950.pdf
- https://cdn.shopify.com/s/files/1/0436/1030/8765/files/nujetitupit.pdf
- https://cdn.shopify.com/s/files/1/0430/3319/8745/files/dua_lipa_homesick_piano_sheet_music.pdf
- https://static.usrfiles.com/ugd/1acd69_b6943a31d72c43f6ac8c71e3653e996e.pdf
- https://static.usrfiles.com/ugd/fa6f14_b38eb74bc6da4f9ba6d7b5465fe54f9f.pdf
- https://static.usrfiles.com/ugd/957c7b_967db6cea30e4ec089cbe8d1cd46a339.pdf
- https://static.usrfiles.com/ugd/d6b5da_9b47e7667f00454d8a5c7636e619fe35.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000685d.bin` `9cdc4bdbf7c0d073e22c3a25b7b50d6be93b001b1d3238f819dbf410ce3ed784`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x685D	5512 bytes
`font_01_sfnt_off00007b0a.bin` `397759093c4d051f5f8bb5032d018eb4e94bce016ace58346b2914e4fb7c68ef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B0A	10316 bytes
`font_02_sfnt_off00009e11.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E11	4324 bytes
`font_03_sfnt_off0000ac11.bin` `a10e9ac14a3f533a93b75cc840b4641f94b81b713d2ce90e5eb12c93878e0602`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC11	6776 bytes

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