If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:nationalfuelgas.com/seneca/production_info.pdf redirected to: nationalfuelgas.com/seneca/production_info.pd...
Url ContentAdobe Portable Document Format
MIME Type / Internet Media Typeapplication/pdf
MIME Type application
File Extension.pdf
More Details (link to:)Adobe PDF
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 301 Moved Permanently
Content-Length 593
Content-Type text/html; charset=UTF-8
Location htt????/nationalfuelgas.com/seneca/production_info.pdf
Server Microsoft-IIS/8.5
X-Powered-By ASP.NET
Date Wed, 24 Jan 2018 09:50:41 GMT
HTTP/1.1 200 OK
Content-Length 12643
Content-Type application/pdf
Last-Modified Thu, 02 Nov 2017 21:47:33 GMT
Accept-Ranges bytes
ETag 70c75e302454d31:0
Server Microsoft-IIS/8.5
X-Powered-By ASP.NET
Date Wed, 24 Jan 2018 09:50:42 GMT

Load Info

page size12643
load time (s)0.687047
redirect count1
speed download0
server IP205.235.175.200


* all occurrences of the string "http://" have been changed to "htt???/"