PDF malware analysis — malicious · 4b0b21e2f6c4abe0

MALICIOUS

PDF

45.3 KB Created: 2020-09-30 22:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: ebc4a1b944e3116facb78174379ef8b8 SHA-1: e87fe7ec2097cca9375d0bf9da80f0f0381cef40 SHA-256: 4b0b21e2f6c4abe01c16cf9f89dec2bb306d73f2b4324dc0aec6374b4d8fe081

124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://gettraff.ru/strik?keyword=determination+of+calorific+value+by+bomb+calorimeter+pdf In PDF document text
- https://site-1037086.mozfiles.com/files/1037086/fatadi.pdfIn PDF document text
- https://site-1038527.mozfiles.com/files/1038527/69839693591.pdfIn PDF document text
- https://site-1036939.mozfiles.com/files/1036939/tutixigawumavisixu.pdfIn PDF document text
- https://site-1036786.mozfiles.com/files/1036786/35216582431.pdfIn PDF document text
- http://laxumakun.lajuanaradcliffe.com/uploads/1/3/2/6/132681352/9627c24d1.pdfIn PDF document text
- http://pumagara.tkdetailinglondon.co.uk/uploads/1/3/1/8/131857598/7914182.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/7b8940d2-5ecc-4b79-8ed3-89f3447e8aeb/wufefowozarufepokoxosi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4929/5776/files/jasusowiziruguve.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3348/4702/files/alight_motion_apk_old_version.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000071af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71AF	5424 bytes
SHA-256: `a5b50990924ce1c72696719a81795a9c34f415142bef10a0805357234cb0b5db`
`font_01_sfnt_off0000841a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x841A	10544 bytes
SHA-256: `d1b0d404ccf937a8a96fb193a81c03ff7c57c066a840e49c81e4aa2729b9be7e`

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