PDF malware analysis — malicious · 8ba75548c04fa5f0

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 06:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bbbd5fe073440950af05151cb49f2176 SHA-1: d1d4436aa333f815645da49a5bf2054b0ae0ca59 SHA-256: 8ba75548c04fa5f00db93be1ca13779250d32bd457db63f5a1c25a4819b4ba35

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One prominent link, https://ttraff.me/wix?keyword=dragon+fin+soup+trophy+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=dragon+fin+soup+trophy+guide
- https://static.usrfiles.com/ugd/405339_df60336eabca45cb897f9b7b544010c5.pdf
- https://static.usrfiles.com/ugd/b8c837_efc115f8b6fc463bb76a6b95ef7dabdc.pdf
- https://static.usrfiles.com/ugd/374ce0_4daa05ee7ef1446a940f54c516d875e7.pdf
- https://static.usrfiles.com/ugd/32777b_4bb2e271a94d404f8522d53675978dd2.pdf
- https://static.usrfiles.com/ugd/c3f88d_4ed06e2693484e28bd19200856983fa9.pdf
- https://static.usrfiles.com/ugd/b8c837_693ee6fde0234f50981d66cb7a8eb40f.pdf
- https://static.usrfiles.com/ugd/3826db_71b023e920e34d5a88a090f06a41f4dc.pdf
- https://static.usrfiles.com/ugd/d9d1f5_43effe76a3384e579f735ea5297a2788.pdf
- https://static.usrfiles.com/ugd/c3f88d_a30a5d5832e34d6a9d107dde2fdb9ee7.pdf
- https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
- https://static.usrfiles.com/ugd/b8c837_575d11f4fe1e45be931d8279bc13c3a6.pdf
- https://static.usrfiles.com/ugd/04e6f9_c386e84966e243abb7d3eb1e140df0d5.pdf
- https://static.usrfiles.com/ugd/b8c837_dbd9e75d778640b4b357b5f909b12d62.pdf
- https://static.usrfiles.com/ugd/238140_79f706bd34154b16bba4a4ea9fe81093.pdf
- https://static.usrfiles.com/ugd/b77b08_a4d24d81bc53484db94675ceba1f4bda.pdf
- https://static.usrfiles.com/ugd/95089d_259bc8ed2b17495fa9b2b682eb341168.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_off00006b16.bin` `afdc02cdd6513f9465ac4b7707aa91a6edfd7615d22e261158f332c1a5d181ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B16	5372 bytes
`font_01_sfnt_off00007d60.bin` `3f7a983110e74b160cc17e4af29b7c87f00a56a66beeacfcfe2e2e6ec849eb30`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D60	10164 bytes

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