PDF malware analysis — malicious · 5465ebf291e05864

MALICIOUS

PDF

44.9 KB Created: 2020-09-01 05:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 085a8df219ad7ea539fcd0b99ec72329 SHA-1: f4badab23fd51e0732e501baa8905fb3140b1f67 SHA-256: 5465ebf291e05864af9828a4453d2d628618c59679f89c9917de773c93d62572

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with 24 external PDF links identified. One of these links, https://ttraff.club/wix?keyword=bee+gees+greatest+hits++zip, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of the malicious redirector and the link farm suggests an attempt to lure users to malicious sites, possibly for phishing or malware distribution.

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.club/wix?keyword=bee+gees+greatest+hits++zip
- https://static.usrfiles.com/ugd/e42ee3_a9093fc1bde64c35ad077f7fc4f76549.pdf
- https://static.usrfiles.com/ugd/b8c837_9b379de2e3ad4784b77d7e57621d9fbe.pdf
- https://static.usrfiles.com/ugd/b8c837_7f949fd4c32245dea35cfdcd393a6c3a.pdf
- https://static.usrfiles.com/ugd/b8c837_8c4eed335fd642a4af7c3d861c14881c.pdf
- https://static.usrfiles.com/ugd/07ef24_384746585721446891d01577bc1b5ac3.pdf
- https://static.usrfiles.com/ugd/6d59ab_5dec3357ae3046edb538bac7425ac0a2.pdf
- https://cdn.shopify.com/s/files/1/0433/5327/6574/files/56838778507.pdf
- https://cdn.shopify.com/s/files/1/0441/0369/6536/files/91403821836.pdf
- https://static.usrfiles.com/ugd/ec0c41_ad5c44135d724656a7f05267090baf51.pdf
- https://static.usrfiles.com/ugd/99a8f2_a74f05a15f08481290a3275bef68f96b.pdf
- https://static.usrfiles.com/ugd/738632_8777b695e48a4aef96aa956a8d0405c9.pdf
- https://static.usrfiles.com/ugd/50de67_de0ed257ddfe472b8d78f5cdbff573b2.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_off0000658a.bin` `38987d21c960103ed0c529aefd558cf7d323c4dd345c7842a1b01d369b21fa8c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x658A	5148 bytes
`font_01_sfnt_off00007716.bin` `35c358cb8c4bb1d829742e0756d1b92b55a56a539accef79cdf8fa392ed51c86`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7716	15620 bytes

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