fixing/removing some more dead links

[danielplohmann]

No description provided.

[adulau]

['https://www.cfr.org/interactive/cyber-operations/magic-hound', 'https://www.secureworks.com/research/the-curious-case-of-mia-ash', 'https://www.cfr.org/interactive/cyber-operations/operation-cleaver', 'https://www.cylance.com/content/dam/cylance/pages/operation-cleaver/Cylance_Operation_Cleaver_Report.pdf', 'http://www.secureworks.com/cyber-threat-intelligence/threats/suspected-iran-based-hacker-group-creates-network-of-fake-linkedin-profiles/', 'https://www.cylance.com/content/dam/cylance/pages/operation-cleaver/Cylance_Operation_Cleaver_Report.pdf', 'https://www.trendmicro.com/vinfo/us/security/news/cyber-attacks/operation-woolen-goldfish-when-kittens-go-phishing', 'https://unit42.paloaltonetworks.com/unit42-magic-hound-campaign-attacks-saudi-targets/', 'https://www.secureworks.com/blog/iranian-pupyrat-bites-middle-eastern-organizations', 'https://blogs.microsoft.com/on-the-issues/2019/03/27/new-steps-to-protect-customers-from-hacking/', 'https://www.trendmicro.de/cloud-content/us/pdfs/security-intelligence/white-papers/wp-the-spy-kittens-are-back.pdf', 'https://blog.checkpoint.com/wp-content/uploads/2015/11/rocket-kitten-report.pdf', 'https://attack.mitre.org/groups/G0059/', 'https://attack.mitre.org/groups/G0003/']: ['https://www.cfr.org/interactive/cyber-operations/magic-hound', 'https://www.secureworks.com/research/the-curious-case-of-mia-ash', 'https://www.cfr.org/interactive/cyber-operations/operation-cleaver', 'https://www.cylance.com/content/dam/cylance/pages/operation-cleaver/Cylance_Operation_Cleaver_Report.pdf', 'http://www.secureworks.com/cyber-threat-intelligence/threats/suspected-iran-based-hacker-group-creates-network-of-fake-linkedin-profiles/', 'https://www.cylance.com/content/dam/cylance/pages/operation-cleaver/Cylance_Operation_Cleaver_Report.pdf', 'https://www.trendmicro.com/vinfo/us/security/news/cyber-attacks/operation-woolen-goldfish-when-kittens-go-phishing', 'https://unit42.paloaltonetworks.com/unit42-magic-hound-campaign-attacks-saudi-targets/', 'https://www.secureworks.com/blog/iranian-pupyrat-bites-middle-eastern-organizations', 'https://blogs.microsoft.com/on-the-issues/2019/03/27/new-steps-to-protect-customers-from-hacking/', 'https://www.trendmicro.de/cloud-content/us/pdfs/security-intelligence/white-papers/wp-the-spy-kittens-are-back.pdf', 'https://blog.checkpoint.com/wp-content/uploads/2015/11/rocket-kitten-report.pdf', 'https://attack.mitre.org/groups/G0059/', 'https://attack.mitre.org/groups/G0003/'] has non-unique elements

Thank you for the PR. Could you remove the non-unique element from the reference?

[adulau]

Top! Thank you very much!