PDF malware analysis — malicious · b3fa7a52bd544fb4

MALICIOUS

PDF

80.2 KB Created: 2020-09-04 19:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 142bca0d12674d8d17f0f9fb74c83fac SHA-1: 5e8b58200c885c702262a1b8ca29581a7a48ce73 SHA-256: b3fa7a52bd544fb465a0241af179569e91f7fd2509cd0aca2fd573b77d178ed3

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a mass external PDF link farm, with one URL identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests an urgency lure, likely to encourage clicks on the provided links. The primary malicious link identified is ttraff.link, which redirects to a page related to 'normal pressure hydrocephalus treatment guidelines'. The file also contains numerous links to static.usrfiles.com, which appear to be part of the link farm.

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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.link/wix?keyword=normal+pressure+hydrocephalus+treatment+guidelines
- https://static.usrfiles.com/ugd/a2d007_14b475ec78654d88aaeb1d16f8aaa06b.pdf
- https://static.usrfiles.com/ugd/1cc7e8_df91d12a4ba445c097c92ed8210a5781.pdf
- https://static.usrfiles.com/ugd/b1b16e_dac4315f1f6f4616a4c275c269d3a022.pdf
- https://static.usrfiles.com/ugd/ce0e6d_dcde245d85634fc3872a98b793ec7c09.pdf
- https://cdn.shopify.com/s/files/1/0432/9301/6222/files/49257392778.pdf
- https://cdn.shopify.com/s/files/1/0435/2878/1988/files/blooming_garden_game.pdf
- https://static.usrfiles.com/ugd/822ecd_61c77273ab3b4e3cb3407d070dda0e52.pdf
- https://static.usrfiles.com/ugd/4cf28d_df1a60a0d40943fe825279a1fca79d5f.pdf
- https://static.usrfiles.com/ugd/909b15_07ea54bba1e349ba8bf0234d1f02a402.pdf
- https://static.usrfiles.com/ugd/529dbf_ec8ed3bcad534a9caaf774a57b38a6c0.pdf
- https://static.usrfiles.com/ugd/47b1e8_6abb2593158e47adb678755a62f0ce90.pdf
- https://static.usrfiles.com/ugd/b8c837_c60f0e16c4c7435696cc43e21fbc263b.pdf
- https://static.usrfiles.com/ugd/83d902_3f3ed00b99334ed58f030f80a46ec9d9.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_off0000e7c7.bin` `3ae56fa8a1e93ca984109e191b4e18d8c8e276aecba189c5def4d903b08ad827`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C7	5440 bytes
`font_01_sfnt_off0000fa28.bin` `fc012fe901d3d03204e52e02ce3098841fddf27a8fdcb99479cb5d7bb79737d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA28	13800 bytes
`font_02_sfnt_off0001258d.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1258D	4324 bytes

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