PDF malware analysis — malicious · 0e23e6c8be182a7b

MALICIOUS

PDF

42.6 KB Created: 2020-09-04 20:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e2ef16055f3988e03af71f6d22d2b070 SHA-1: 20bca330cdb8d5b1d90dc0ee725e0d96c53b43bd SHA-256: 0e23e6c8be182a7b49ccc0b45de797387f5f33e112a23da990f2cb983f9bd699

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.club/wix?keyword=miss+fortescue+fishing+report'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, with 'https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf' being the first listed. The ML classifier also flagged this PDF with high confidence. These elements suggest the document is designed to redirect users to malicious content, likely for phishing or malware delivery.

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.club/wix?keyword=miss+fortescue+fishing+report
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
- https://static.usrfiles.com/ugd/2f3216_da81007a513941099dbe36e9042169fb.pdf
- https://static.usrfiles.com/ugd/0baf77_64c1641d24ce491eb8d1a6ab622259bf.pdf
- https://static.usrfiles.com/ugd/f9d4cd_e93f7646124c402a823e78a6c456d9e3.pdf
- https://cdn.shopify.com/s/files/1/0438/7300/9819/files/48972196310.pdf
- https://static.usrfiles.com/ugd/b8c837_5efe5833b3c54858ac7df3b96a4a7ffc.pdf
- https://static.usrfiles.com/ugd/cec570_86310d40a4ea48d983840c7292bc73fa.pdf
- https://cdn.shopify.com/s/files/1/0435/3579/4344/files/joguxunelagaz.pdf
- https://cdn.shopify.com/s/files/1/0427/9864/5404/files/vudukadarijerudugobageja.pdf
- https://cdn.shopify.com/s/files/1/0431/7914/7430/files/facebook_sdk_ios.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_off00006a26.bin` `9eeb04d941bb31426ebf96965c35ba855399d564853f3addf63fc6be20948a98`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A26	5040 bytes
`font_01_sfnt_off00007b5e.bin` `45064d54468e4fd2c32e54cb04899c75e583cc044ed2856b9ef11fca34d718e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B5E	10200 bytes

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