PDF malware analysis — malicious · 72653dbf8d8ee7a9

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 08:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f7633a51c6dd367e09f80d7a39e9e4c4 SHA-1: a068803ab7c404c12bc44475948f941d176d31e6 SHA-256: 72653dbf8d8ee7a9bf1881a02c3b49e83b95c311e9d4e2b89e9bc8bc62d651f9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a primary URL that redirects to malicious infrastructure, disguised with a celebrity name to entice clicks. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content.

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=kim+kardashian+book+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_9f0762c458cd4268a4fb6e90216b3018.pdf
- https://static.usrfiles.com/ugd/3b47cb_817f2517817249a2aa37fa07f648948c.pdf
- https://static.usrfiles.com/ugd/bae363_3db168a32b8e491b8757348006784ccf.pdf
- https://static.usrfiles.com/ugd/b8c837_a274c7be6de0496aac62e064195b64de.pdf
- https://static.usrfiles.com/ugd/b8c837_6cbaf4432a3240aebeb8cc751c0e4c84.pdf
- https://static.usrfiles.com/ugd/ac72e0_b199764448134557a3906f6094fd01b3.pdf
- https://static.usrfiles.com/ugd/34ec99_087eda7e3da4462aaae5d99edf8726a3.pdf
- https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
- https://static.usrfiles.com/ugd/760101_4c4e7f9bedfa4fdda402cc556ff29d88.pdf
- https://static.usrfiles.com/ugd/cbdbb6_b5c722bd52084678a740b12a6bf24216.pdf
- https://static.usrfiles.com/ugd/b98abb_945ba475fb7b4debabcc9fcd20dd4251.pdf
- https://static.usrfiles.com/ugd/b8c837_59eba415dd24402eadfa50bc7d0585f8.pdf
- https://static.usrfiles.com/ugd/97634b_9a96e019a8764c1281265cf6c2d15c8f.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005fd0.bin` `9833ff330c2d675f485f1b9415c1a9f65b823d293f12d0a15da45bdcd6d97bc1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FD0	5424 bytes
`font_01_sfnt_off00007209.bin` `3c8cb3f428b519963c8633a5a9f5a608433a75eb5760e4ac9f3a94b9930f43f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7209	10568 bytes

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