PDF malware analysis — malicious · 5ff553ec8fcbdc28

MALICIOUS

PDF

50.8 KB Created: 2020-09-10 05:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5785992814774ec68d0c6655bd1af990 SHA-1: d05fb59c021aad8ad6541c2c260601dc09b562b9 SHA-256: 5ff553ec8fcbdc28c791368d1cba0d0ecccf615a5a9d9aa681b8690fe7ce4da6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=antenatal+care+guidelines+rcog', is designed to lead users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to manipulate search engine results or distribute content through a network of sites.

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=antenatal+care+guidelines+rcog
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/3573/7764/files/gejaw.pdf
- https://cdn.shopify.com/s/files/1/0434/5082/6905/files/talase.pdf
- https://cdn.shopify.com/s/files/1/0440/6027/8936/files/84722840263.pdf
- https://static.usrfiles.com/ugd/0d002d_5da9205eb99b4d5fb2b6d337e6451b0e.pdf
- https://static.usrfiles.com/ugd/8716ab_3fdadaf927704ae9b6e5576afe21349d.pdf
- https://static.usrfiles.com/ugd/9ced5d_13dea172a2674160b621beb2d952f9b3.pdf
- https://static.usrfiles.com/ugd/43d598_27494aa7ffc94e7482004ae70ca8ad21.pdf
- https://cdn.shopify.com/s/files/1/0430/3945/7431/files/dewabiv.pdf
- https://cdn.shopify.com/s/files/1/0430/6200/1821/files/71562667977.pdf
- https://cdn.shopify.com/s/files/1/0435/1331/5480/files/effortless_power_english_free.pdf
- https://cdn.shopify.com/s/files/1/0431/3530/3831/files/wamujakugenenudonoku.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_off00008288.bin` `6ead517256e1a8e949fbdeaf6de4a36111c1453b4e4b2135dfb9e1efc4563f90`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8288	5096 bytes
`font_01_sfnt_off000093e3.bin` `18f5b29550e009bbb2cde701bcde0448368a014071ad8c2925a4c22daec99908`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93E3	13480 bytes

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