PDF malware analysis — malicious · 9da79e3fb3ece6aa

MALICIOUS

PDF

73.3 KB Created: 2020-07-31 07:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2c0ccb8edffa4f0671194d083af9641c SHA-1: 580df6ec37a1c26ad0594608a04fcd77101cf134 SHA-256: 9da79e3fb3ece6aa41cc87d7cfbf4d40c7a7d77c0b2a92773df0fd79265fc821

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of the primary links directs to a known malicious redirector, ttraff.ru, disguised as a bearing designation chart. This suggests the document's purpose is to redirect users to malicious infrastructure for further exploitation or phishing.

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/pify?keyword=skf+bearing+designation+chart+pdf
- http://files.jmptattoo.com/uploads/1/3/0/7/130776298/7575081.pdf
- http://files.pallavisharma.com/uploads/1/3/0/8/130814205/883165.pdf
- http://files.robohounds.com/uploads/1/3/1/8/131856569/711e87cbfe05053.pdf
- http://files.adibezalel.com/uploads/1/3/0/7/130774964/2481281.pdf
- http://files.emmaunderwood.co.uk/uploads/1/3/1/3/131384636/a882f88a.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugogesobiwem.pdf
- https://cdn.shopify.com/s/files/1/0428/0093/9164/files/14554731565.pdf
- https://cdn.shopify.com/s/files/1/0433/8748/6358/files/ridowig.pdf
- https://cdn.shopify.com/s/files/1/0436/0772/0094/files/dadivojosiroxesum.pdf
- https://cdn.shopify.com/s/files/1/0439/4532/8808/files/simebaweruxibakidi.pdf
- https://cdn.shopify.com/s/files/1/0434/5063/0296/files/77485838684.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
- https://cdn.shopify.com/s/files/1/0428/7689/5398/files/wukigowolixugodixakubini.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.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_off0000d740.bin` `08f29f0dbadd6d46c2efbbea175db6550b8e8a58f3cc1505b86da40a5bcf4df3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD740	5480 bytes
`font_01_sfnt_off0000e9cf.bin` `b50ccffcc5b5a3785eedf50c090f3ca03887c667720f6a5889f6951b25f85acb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9CF	14208 bytes

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