PDF malware analysis — malicious · c69d173f4dbfb027

MALICIOUS

PDF

72.5 KB Created: 2020-08-30 13:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ac168fb1f961c999ce6138823b3d6e5e SHA-1: 389fc9be5625eb8bb0085d8288640efcc5d75730 SHA-256: c69d173f4dbfb027e9d730c7aaeba750fbb490fa44df2d8bec09bf113d9935cc

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to known malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=pares+biomagneticos+por+enfermedades+pdf. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm designed to redirect users to malicious content.

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=pares+biomagneticos+por+enfermedades+pdf
- https://static.usrfiles.com/ugd/b8c837_586882f55bae49f7be74bbd8bae9132f.pdf
- https://static.usrfiles.com/ugd/b8c837_19154cf37f1f486abfee7d2ebc6f5201.pdf
- https://static.usrfiles.com/ugd/3f80ec_6801008fefd64607850c0eb7d842d53d.pdf
- https://static.usrfiles.com/ugd/e745be_715a985dedb042228d11369d69894c25.pdf
- https://static.usrfiles.com/ugd/234f58_0d4b1e80315d4deaa1d4d3a758487363.pdf
- https://static.usrfiles.com/ugd/b8c837_58698c06fa6840518f5369d122e9ed50.pdf
- https://static.usrfiles.com/ugd/a44510_35d15d9191a2465185490dc97d5a7990.pdf
- https://static.usrfiles.com/ugd/b8c837_ddcf71396a3c463a99180d85e72960ff.pdf
- https://static.usrfiles.com/ugd/a107db_d73e84cceaff490cb09a29dff8267b76.pdf
- https://static.usrfiles.com/ugd/b8c837_47e7a86fa69c4d9eb9c52e1113801517.pdf
- https://static.usrfiles.com/ugd/b8c837_868d8264d78d4aec8feb2fc91f93e382.pdf
- https://cdn.shopify.com/s/files/1/0435/5879/7471/files/find_duplicates_in_excel_spreadsheet.pdf
- https://cdn.shopify.com/s/files/1/0430/3680/3233/files/31821577112.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_off0000c585.bin` `cdf270133a1acd589d40515574fb0166eb617f993d85dbbb132dd06602cf82f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC585	1880 bytes
`font_01_sfnt_off0000cea8.bin` `59ba2f9637410311ee508b130ee2f8cb1a757d35c42b1b9dae01182ae6490bf9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEA8	5372 bytes
`font_02_sfnt_off0000e0c8.bin` `656f4deb4eef5288d32b325c648233ad7fa0026b1e3cad1fc5c9f43e82e2a6f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0C8	11156 bytes
`font_03_sfnt_off00010500.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10500	4324 bytes

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