PDF malware analysis — malicious · 0f8d9670f70dd98d

MALICIOUS

PDF

39.2 KB Created: 2020-08-29 18:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d0a0a071e81d144a26d712c6646ac23f SHA-1: 74a172a000b36cd4e3340e31b26af2737d46b786 SHA-256: 0f8d9670f70dd98d1d507b54b08c242bbb19d9ef5a09f850c6e1053eb1b17895

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that lead to a redirector service, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting it is an 'artifact analysis worksheet' and includes the malicious URL, likely intended to trick the user into clicking it. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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.ru/wix?keyword=artifact+analysis+worksheet
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_6b61e6cd388a42f48e0b2d3385a06b1d.pdf
- https://static.usrfiles.com/ugd/b8c837_6b6d999c51a34c7996ee9ac66540983d.pdf
- https://static.usrfiles.com/ugd/b8c837_b1b6dd5e34a34c318935621fec93e880.pdf
- https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
- https://static.usrfiles.com/ugd/b8c837_c6eba044e763446e97e044e59ea99c06.pdf
- https://static.usrfiles.com/ugd/b8c837_45bbcf50317944e9922dec9d260c78bc.pdf
- https://static.usrfiles.com/ugd/b8c837_b71340a52ce44950926d405c7b26cc05.pdf
- https://static.usrfiles.com/ugd/b8c837_9103ccc0c81647c68040e4b2ae5c9f27.pdf
- https://static.usrfiles.com/ugd/b8c837_794b5c0f66064eee9cdda046c14ab03f.pdf
- https://static.usrfiles.com/ugd/b8c837_88df5c8725814e8daedac952781e8b81.pdf
- https://static.usrfiles.com/ugd/b8c837_c2cdf11cf77d41e495478a8651f93925.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_off00005b20.bin` `9ef34805349bdddd120d5a16efab39e97b60008907b110a0179f0042266b89ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B20	5216 bytes
`font_01_sfnt_off00006cea.bin` `c907528ad3532028aaa932214743b0e8c4b27caf86bab2d8cb1a6ca5f9048719`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CEA	10676 bytes

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