PDF malware analysis — malicious · 389198929f380c51

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 10:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a16b55b650500d285e057190867a00fd SHA-1: 4dbc06961b97ecf50b8111edbea0ef5aafcac0f8 SHA-256: 389198929f380c51c0f1052c468a45ae619ba7cd6a3083b831dec783f6a02a1a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a "mad minute multiplication" theme, which is a common lure for educational or practice content. However, it embeds a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious sites. The PDF also contains a large number of links to static.usrfiles.com, likely part of a link farm to improve SEO for the malicious content. No scripts were extracted, but the primary malicious activity is the redirection via the embedded URL.

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=mad+minute+multiplication
- https://static.usrfiles.com/ugd/b8c837_7f400e71323044a0907474fc5acfc8b7.pdf
- https://static.usrfiles.com/ugd/b8c837_122c8ffb822842fb91337fd11e7ec27c.pdf
- https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
- https://static.usrfiles.com/ugd/0bcf16_0a36a4a96eb94f79b8d6aa8dff222ed1.pdf
- https://static.usrfiles.com/ugd/b8c837_22b0c5ed73d54e8587178a9e9085a01c.pdf
- https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
- https://static.usrfiles.com/ugd/b8c837_b24d0f4f2f92465e83538cb48651541f.pdf
- https://static.usrfiles.com/ugd/7c3584_3575d688831c4ab6b5f2bf9db18fad82.pdf
- https://static.usrfiles.com/ugd/b8c837_607cf5f478734dbaa885c6cc1aadfda5.pdf
- https://static.usrfiles.com/ugd/77d535_16c83bf087ac46b8963c387458089edd.pdf
- https://static.usrfiles.com/ugd/ce0e6d_da9e3bc05ac64a9bbcea6a51f1309d49.pdf
- https://static.usrfiles.com/ugd/3b7182_58c73f4b482640669ff0a69595e4788e.pdf
- https://static.usrfiles.com/ugd/b8c837_15f4411b1b23475ca41555fa8aed14fd.pdf
- https://static.usrfiles.com/ugd/b8c837_a52c3384528c42f8ad4560c85f05aa5e.pdf
- https://static.usrfiles.com/ugd/c4ccc4_c002f14f31ec411cbab40af86e95a8f8.pdf
- https://static.usrfiles.com/ugd/b8c837_4afe074db90c414882ada8697861c3ba.pdf
- https://static.usrfiles.com/ugd/eaf48f_4cc7f5daf1404dd5b7dd69eb98583ce9.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_off00006421.bin` `939c776dee4edcb824fedb1f5cdb4a2fd52f934ef48ee414c360ffd9ceaf278b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6421	4952 bytes
`font_01_sfnt_off000074e2.bin` `618046dcf55771e5ab3b27f098765f99a54ca49f0cbc018546cc9fdbfbac765a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74E2	10704 bytes

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