PDF malware analysis — malicious · ad28bf9d65093cbd

MALICIOUS

PDF

39.8 KB Created: 2020-08-11 02:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d11a3a9dd6dd600f9f6fb52b245bbd51 SHA-1: df830f08e20d7e1ffb54eb2365b0293c9eb29440 SHA-256: ad28bf9d65093cbdb7409cbc4f569d7fd0d614bcab9f9e4c8b9946b3bbd6bce3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical finding is a link to `ttraff.com`, a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL `https://ttraff.com/pify?keyword=eduardo+galeano+futbol+pdf`, reinforcing the malicious redirection attempt.

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/pify?keyword=eduardo+galeano+futbol+pdf
- http://kanuta.westmountwildrugby.com/uploads/1/3/0/8/130814124/01a84.pdf
- http://files.rendonmediation.com/uploads/1/3/1/4/131408353/tovafozetudujujabute.pdf
- http://files.lkhair.co.uk/uploads/1/3/0/7/130739864/zotafesunozupizis.pdf
- https://cdn.shopify.com/s/files/1/0433/4324/9563/files/34296407500.pdf
- https://cdn.shopify.com/s/files/1/0433/0032/3478/files/97477758976.pdf
- https://cdn.shopify.com/s/files/1/0447/5827/0101/files/kopowopogu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
- https://cdn.shopify.com/s/files/1/0431/8904/3358/files/78790328923.pdf
- https://cdn.shopify.com/s/files/1/0433/7316/6744/files/31091728899.pdf
- https://cdn.shopify.com/s/files/1/0430/6200/1821/files/39809128396.pdf
- https://cdn.shopify.com/s/files/1/0430/0252/7897/files/37143223007.pdf
- https://cdn.shopify.com/s/files/1/0430/9932/4567/files/xopisipapan.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_off00005df6.bin` `7ebcdef51eef5fa977657e80cc718079949a7cca2d23beb3958ffd711492e699`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DF6	5128 bytes
`font_01_sfnt_off00006f72.bin` `20ea62eddb5e17ac25684ddf2de2b5893fce14024a6c1df6973bea4e5654f78b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F72	10344 bytes

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