PDF malware analysis — malicious · 32afbcf431f52397

MALICIOUS

PDF

43.0 KB Created: 2020-09-02 00:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: da6048fee373b9c35757e3be0f6689b2 SHA-1: 8b54c3c1f3880b37d38751bd0e0eefdb166a43e8 SHA-256: 32afbcf431f523972d9d2f9c6c9bee9d5c04ccf9bc41cdb67c29fff138547461

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.com/wix?keyword=carplay+android+auto+head+unit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=carplay+android+auto+head+unit
- https://static.usrfiles.com/ugd/d3758e_0aab892fdc2c41e980145a268ed775d1.pdf
- https://static.usrfiles.com/ugd/ef253e_5b3e4604f6e9406eb96751d478ed154c.pdf
- https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.pdf
- https://static.usrfiles.com/ugd/b0cd75_57c44851a89e4f40a60a301a63726364.pdf
- https://static.usrfiles.com/ugd/f35da0_9de6d5201ca84ab9a61d0b8b1b973546.pdf
- https://static.usrfiles.com/ugd/b8c837_4263e917e5ab430bbce7e8548f6d2abe.pdf
- https://static.usrfiles.com/ugd/b8c837_dbd07f14ab5f45fd859c2f79901bb49b.pdf
- https://static.usrfiles.com/ugd/ef253e_aeedfa2e2d9f48ca9392c7882a6568dc.pdf
- https://static.usrfiles.com/ugd/3e5d97_3085641a42db47c39ca825703e9f59c4.pdf
- https://static.usrfiles.com/ugd/d94ae5_b06e57f367624acd81054062565030fe.pdf
- https://static.usrfiles.com/ugd/be19e1_d0e991cfc3aa4159898c8193d2724ec4.pdf
- https://static.usrfiles.com/ugd/b8c837_98fc5aa7399b4310be49e70d6ba902a8.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_off00006b43.bin` `46bd92d9dfff15e6fc582c0b3ca333f79485664c49e972345ecb530107c42ae5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B43	4876 bytes
`font_01_sfnt_off00007bd2.bin` `d0c9ef92f5177e183bba1b6d0ebf66609b0902bba068525e4de047415781e8ac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BD2	10416 bytes

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