PDF malware analysis — malicious · 273f052a119e5388

MALICIOUS

PDF

51.5 KB Created: 2020-09-01 23:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3efad3157c482222cf385be91e4f9a86 SHA-1: 7c7070304523192626efd3b898a55584e247e5c0 SHA-256: 273f052a119e5388e46f80866f0958f3103540b4e3b5e97f9e6a5f3e48c0fa87

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious due to its inclusion of a link farm containing numerous external links. One of these links, 'https://ttraff.me/wix?keyword=ugc+full+form+for+university', points to a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of the link farm and the malicious redirector strongly suggests an attempt to lure users to malicious content.

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=ugc+full+form+for+university
- https://static.usrfiles.com/ugd/b8c837_476e506ee621455a999c44bbb08bdf8b.pdf
- https://static.usrfiles.com/ugd/d902bb_18ecfff554894eaab310f21b04786fbf.pdf
- https://static.usrfiles.com/ugd/685707_07e1ce75d1b94a7b99435d6ef186479f.pdf
- https://static.usrfiles.com/ugd/f65175_9f5342e8b77644d59471a3be71c6d831.pdf
- https://static.usrfiles.com/ugd/3bcfef_da744d7e4a844de284b8939b281061b0.pdf
- https://static.usrfiles.com/ugd/dc8a8e_48dbc51c969d494191013f029f2f634d.pdf
- https://static.usrfiles.com/ugd/3e87bf_347eb48b200c4586b5c547518e985d89.pdf
- https://static.usrfiles.com/ugd/b8c837_473943440a764100b3342c0fbc9bb6af.pdf
- https://static.usrfiles.com/ugd/9b7d8a_2660bff2959f48c388703d3004a048b6.pdf
- https://static.usrfiles.com/ugd/cd79e3_d403ec8e0dc140c6af727d1bef989447.pdf
- https://static.usrfiles.com/ugd/12745a_15416b61577a404e8e672f0640891550.pdf
- https://static.usrfiles.com/ugd/b4f0c6_80d744385ce246b789d34068eae6cb1c.pdf
- https://static.usrfiles.com/ugd/b8c837_cb8444e3457a4832bae96b7ddb14674a.pdf
- https://static.usrfiles.com/ugd/9cc572_b7837f0938124dd684fccb524c94fd0d.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_off00007521.bin` `2903e1086aa70ba1994d41a2fd739540e0060522b3682b77e0dccb0dfa365ba1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7521	5144 bytes
`font_01_sfnt_off000086aa.bin` `3943a6c574728e11160688e4b5f313c9882e69e62dccfdd118687eee5b78cd66`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86AA	10124 bytes
`font_02_sfnt_off0000a98a.bin` `1e8157fae6c5145b82e5cae93eea8422ec0e7598038c1d8074c563c55bdbfc3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA98A	7032 bytes

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