PDF malware analysis — malicious · 7f0e0e6108bb107b

MALICIOUS

PDF

43.8 KB Created: 2020-09-07 00:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aa13cb11b331a1cdb84ba88e3f888995 SHA-1: 7358c88562dc2a9e8c75e9f18bb2b8af4a309cbc SHA-256: 7f0e0e6108bb107b82c59ddd2423a5dd8471a493a9bbadfe5b0ec564edd78098

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL. The presence of numerous external PDF links suggests a link farm, potentially used to obscure the true malicious destination or for SEO poisoning. The ML classifier strongly indicates malicious intent.

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.link/wix?keyword=oreaf+arbutin+mask+sheet
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e3ed1f_57a8c5b136354b6e8d02a8c6b246dfb7.pdf
- https://static.usrfiles.com/ugd/8a419d_5ff3d66079634de7b3f2be708a0c4f1e.pdf
- https://static.usrfiles.com/ugd/f523c3_4f11c6366ff347b5bfa18540aa0309dc.pdf
- https://static.usrfiles.com/ugd/73f3b0_8ad79575123347359a1e4dcb13bfcfc6.pdf
- https://static.usrfiles.com/ugd/b8bbd7_16aa476ba80b4acbbb46eeba21e7d207.pdf
- https://static.usrfiles.com/ugd/f9fac6_de91336b0bf841c2a7a08d81cb84643c.pdf
- https://static.usrfiles.com/ugd/b8c837_169c9eff585f45d593665a06615ddecc.pdf
- https://static.usrfiles.com/ugd/affaa6_e4b4ebcee9d34aa4a05c1ff5b4a05bf8.pdf
- https://static.usrfiles.com/ugd/b8c837_d4241ec326ec442ea865977467cb768c.pdf
- https://static.usrfiles.com/ugd/0c268c_8a3570fe4ed547e99a7fe9a7dbabbfa0.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/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006014.bin` `d719fdf2e81fdc1c93be02eb757ffa03482d14ed3978262b9d17b5886b126ecc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6014	3740 bytes
`font_01_sfnt_off00006d68.bin` `349d4fb966eb122347bf9ccd1937ded3360a286aea49eacc6e20dae213630ac5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D68	5208 bytes
`font_02_sfnt_off00007eef.bin` `4e1fc69aa430105aeda643a61e012c9243239f24e3be70bc25a72f69e6f27939`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EEF	10476 bytes

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