PDF malware analysis — malicious · 86a408d6b74df3ef

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 02:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b6ac56f8c7fd7eef3cb6116300d91bdf SHA-1: 46023dd803d74af6f890aa445685af1e6cfdc048 SHA-256: 86a408d6b74df3efa931af5a340d9358b3670ab0167e25e40e55444efc44ee62

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=report+harassing+phone+calls+florida'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=report+harassing+phone+calls+florida
- https://static.usrfiles.com/ugd/3bcfef_6e00570d03714191a695d02b0aff74ba.pdf
- https://static.usrfiles.com/ugd/99965f_f5e19d1aeae24d458359150aee98ec22.pdf
- https://static.usrfiles.com/ugd/b8c837_265a730817ca492ea2ea61f626ffaf0f.pdf
- https://static.usrfiles.com/ugd/74a852_adb6b00423e142e6a4e70993fda1b503.pdf
- https://static.usrfiles.com/ugd/6924eb_626ae1a922f14175b4ec2b033356b409.pdf
- https://static.usrfiles.com/ugd/c1108c_435de5cc165f40ff9fa6856a73385189.pdf
- https://static.usrfiles.com/ugd/dcfb95_3180adf3312944a68e521eb7bab7e79a.pdf
- https://static.usrfiles.com/ugd/d2cc1f_dfc7619052424c5489fd63c3dd8e42c6.pdf
- https://static.usrfiles.com/ugd/b8c837_a47dd791f8354667970fb3e2ffea5297.pdf
- https://static.usrfiles.com/ugd/b8c837_a4d831feda404e4c92f81e710a87819e.pdf
- https://static.usrfiles.com/ugd/fa6f14_6e9f1543b5c3410382c2a1d839a856e7.pdf
- https://static.usrfiles.com/ugd/b8c837_a7980357f7b346768abc43f292b356c5.pdf
- https://static.usrfiles.com/ugd/b8c837_658a91e6d12544a3b1221d2717d0980e.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_off00006572.bin` `73370c012c748e262143ebcb0bf6274c571cb448909071cceadae16a88ebf966`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6572	5424 bytes
`font_01_sfnt_off000077e3.bin` `418e945939a9dbbe87d7b8dc82a9962cee9b139b8b7e8f22f56f79057fbe0aba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77E3	10092 bytes

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