PDF malware analysis — malicious · 030baf5763a154a2

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 03:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e007a65961d00f6210331bd36feae9da SHA-1: ec8fa196f5067cdb7797d1acf9ac6ed766605bd3 SHA-256: 030baf5763a154a26637019d5bb957dbdd8cd2f114ce5709d545b0361c486482

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a book title, which redirects to malicious infrastructure. This technique is often used in phishing campaigns to trick users into visiting malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links further supports this assessment.

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=from+neuron+to+brain+5th+edition
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_1f0e84610a424a37b2c93476c31e4dcd.pdf
- https://static.usrfiles.com/ugd/b8c837_5317ccdf8a6d47ab8196fcb6113972d2.pdf
- https://static.usrfiles.com/ugd/b8c837_650183f1d51f413196dcc08892f593b3.pdf
- https://static.usrfiles.com/ugd/b8c837_f7d85ffc7e1344a5ac97b1d8aeef9855.pdf
- https://static.usrfiles.com/ugd/b8c837_394a911c7cf646cb9094a2579e39fb85.pdf
- https://cdn.shopify.com/s/files/1/0431/7285/5957/files/2359173078.pdf
- https://cdn.shopify.com/s/files/1/0433/7342/8888/files/bonitas_bonsave_2020.pdf
- https://static.usrfiles.com/ugd/b8c837_31d95a695f884083bc1682679f5bd960.pdf
- https://static.usrfiles.com/ugd/b8c837_67660d60ef52465fa2f1dc49f206c923.pdf
- https://static.usrfiles.com/ugd/b8c837_a70e80a52f3a4c23bb7641c38ced28af.pdf
- https://static.usrfiles.com/ugd/b8c837_17f3278c38ea432f9b2b6b4c24efe6b9.pdf
- https://static.usrfiles.com/ugd/b8c837_0e7d1d0853c747a1ad25edcac3ef4490.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_off000061a7.bin` `fb075ba80e06f8391fbf738b42bc5d076eb313fcb3ac04ed0c4cfdc748912f4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A7	5072 bytes
`font_01_sfnt_off000072b9.bin` `d4d35bc7d8078c89a5d820a70fa2a3954cbd5ff51a6de0b198a2f391e774dda9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72B9	10448 bytes

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