PDF malware analysis — malicious · 4ee5442ab222855e

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 12:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e93e48eba6395bfab3af064a98222797 SHA-1: df77daf17ae200d3c7db1a6aa7101d52b44e5f72 SHA-256: 4ee5442ab222855e4c0cd1e0ab65b6c1d03b4104b7f782b14a46bce5d2ef73c0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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=online+laboratory+reports
- http://genudaruw.bridgewanganui.com/uploads/1/3/2/6/132681556/6368412.pdf
- https://cdn.shopify.com/s/files/1/0431/7442/8827/files/ronuzefivutof.pdf
- https://cdn.shopify.com/s/files/1/0440/0336/0926/files/carers_allowance_application_form.pdf
- https://cdn.shopify.com/s/files/1/0428/0057/8723/files/agenda_teocratica_2020_gratis.pdf
- https://cdn.shopify.com/s/files/1/0428/0621/4819/files/daliwogopurosatajonize.pdf
- https://cdn.shopify.com/s/files/1/0431/6567/9776/files/jurnal_morfologi_caesalpinia_pulcherrima.pdf
- https://cdn.shopify.com/s/files/1/0434/4948/3426/files/jolagabodirux.pdf
- https://cdn.shopify.com/s/files/1/0432/0657/4238/files/99983612092.pdf
- https://cdn.shopify.com/s/files/1/0429/3001/2316/files/48445186441.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005c4c.bin` `e8cd8feac4e14d28583f4bc2e1d63e9e4186ced84caeb0c0f456d0789a2f051f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C4C	4868 bytes
`font_01_sfnt_off00006cda.bin` `aa131c640c21a4631c8e3f16f3c5d20dd8cdc7c449c1709eeade0a7600c515e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CDA	9788 bytes
`font_02_sfnt_off00008e47.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E47	4324 bytes

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