PDF malware analysis — malicious · ed85fc5b104e0077

MALICIOUS

PDF

48.6 KB Created: 2020-09-10 11:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b28bcb4c6c2990925e84d51e36ab15f8 SHA-1: 91163d2397bfc9956e1dc5d7864bdb97cc42a351 SHA-256: ed85fc5b104e0077a3336cea6c3efe251dbbef7634c7553982809c4eed2a62b0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a SEO link farm strategy, aiming to draw users to a malicious site. The primary malicious URL identified is https://ttraff.me/wix?keyword=chiari+malformation+type+1+5mm, which is likely used to redirect users to further 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.me/wix?keyword=chiari+malformation+type+1+5mm
- https://static.usrfiles.com/ugd/0789d5_f2f992a627514e4db27640f54aa02351.pdf
- https://static.usrfiles.com/ugd/191a6d_375c02f313fd45e79f3b9962f82dda83.pdf
- https://static.usrfiles.com/ugd/0c8cc8_4bb25cfc2acd4e728be1798e99aab93f.pdf
- https://static.usrfiles.com/ugd/a771bd_64454be008094683b937255965e93126.pdf
- https://static.usrfiles.com/ugd/6f9b04_c969208548744b27a4ac77be2b71275f.pdf
- https://static.usrfiles.com/ugd/008e52_c4912ea134954181b538c82d25ebda07.pdf
- https://static.usrfiles.com/ugd/0047a4_60a319e27e52436a995723ca0c350a41.pdf
- https://static.usrfiles.com/ugd/1b7c00_de8d2ac0163d4154ba756e5c2d173522.pdf
- https://static.usrfiles.com/ugd/96768c_78f1a1c88a85428f97203bf62a2051f5.pdf
- https://static.usrfiles.com/ugd/952c2e_d1aae712ccbe4729b7c87b1b64dd21c6.pdf
- https://static.usrfiles.com/ugd/d32f78_16ccaa0847b3493ab2c1eb8776276e18.pdf
- https://static.usrfiles.com/ugd/f34323_f296bc3c18734138ae0e63cecd9882d4.pdf
- https://static.usrfiles.com/ugd/b8c837_4456d4e8d39a47e0b54fa0663237473a.pdf
- https://static.usrfiles.com/ugd/b50c55_bea2532736ca422188b62fd42079ee83.pdf
- https://static.usrfiles.com/ugd/665c20_37328bf5914a4ebc975e5d8e2d8ad65e.pdf
- https://static.usrfiles.com/ugd/39cb9d_a5881266743843c89f69ee3db078e91a.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a1c.bin` `42b670e3820fc18af819ff607d657222b886d6cb1f92696df9d71891fb9fb158`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A1C	5144 bytes
`font_01_sfnt_off00008b82.bin` `ffcae5f26b7e23b937925beec12adeefa355e02cd730077be3abba408c77c5eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B82	12820 bytes

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