PDF malware analysis — malicious · 54cf8383ffb2e617

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 06:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 36580d2689730f71945ce968a7819104 SHA-1: 817918b87e697217db3ccb473118a3691105411d SHA-256: 54cf8383ffb2e617809d2ff44e4668403661acbcf7ad60dd8d11733f6baaea46

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to mask malicious intent. The ML classifier also strongly indicated maliciousness.

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=jewish+meditation+a+practical+guide
- https://cdn.shopify.com/s/files/1/0440/4540/2277/files/codigo_civil_comentado_2016_gratis.pdf
- https://cdn.shopify.com/s/files/1/0465/4956/5590/files/suxikasopapeviregasida.pdf
- https://cdn.shopify.com/s/files/1/0429/9302/5187/files/damodaran_applied_corporate_finance_download.pdf
- https://cdn.shopify.com/s/files/1/0435/8186/6143/files/vemomujedu.pdf
- https://cdn.shopify.com/s/files/1/0431/1223/5174/files/arte_de_la_real_audiencia_de_quito.pdf
- https://static.usrfiles.com/ugd/30e015_f39c118188d04467823f4ccc2b1c6418.pdf
- https://static.usrfiles.com/ugd/b8c837_9189c0d0b57d498f90bb808ddc05231a.pdf
- https://static.usrfiles.com/ugd/b8c837_18c05589e98249d5b60f135543a901ba.pdf
- https://static.usrfiles.com/ugd/b8c837_af46178635b24690bcc99f6758291b71.pdf
- https://cdn.shopify.com/s/files/1/0435/9575/9779/files/pearson_baccalaureate_essentials_global_politics.pdf
- https://cdn.shopify.com/s/files/1/0439/3612/0990/files/the_picture_of_dorian_gray_oxford_bookworms.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000047e3.bin` `45d213452ef991bb69dcb7c30dea9e9f260dc191e15b05062cdbd5cbf49f3c57`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47E3	5568 bytes
`font_01_sfnt_off00005ab3.bin` `e0e49245812f77330765aeb68880f07a4e56ba0212e397af71ecdb0371bbc62b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AB3	9744 bytes

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