PDF malware analysis — malicious · b6807d8eb2013549

MALICIOUS

PDF

42.3 KB Created: 2020-10-06 13:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 435b4912051ec49318ef98c224f157bd SHA-1: 62c60b4688dbc85972c21b980f7b6840ecf033ef SHA-256: b6807d8eb201354941a2b622ca583c759cfcf44a3e41a71b38cd970f71c54893

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://ggtraff.ru/pify?keyword=simple+and+compound+interest+worksheet+doc In PDF document text
- https://site-1042287.mozfiles.com/files/1042287/neravuxol.pdfIn PDF document text
- https://site-1038508.mozfiles.com/files/1038508/fanunutunomegojane.pdfIn PDF document text
- https://site-1044164.mozfiles.com/files/1044164/53303478796.pdfIn PDF document text
- http://nagowinud.maskinkompaniet.se/uploads/1/3/1/3/131381787/vowoniwevojitif.pdfIn PDF document text
- https://site-1037829.mozfiles.com/files/1037829/zovuloxijawixesafemapijun.pdfIn PDF document text
- https://site-1036828.mozfiles.com/files/1036828/3611380019.pdfIn PDF document text
- https://site-1038749.mozfiles.com/files/1038749/niriduvejolasu.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/b048be0e-8125-4180-a5e1-ad12064c355c/15976379994.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4757ec8a-5df7-46d9-a00d-a1ccd737e95d/xuruxarutexalapadewisu.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_off0000666b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x666B	5572 bytes
SHA-256: `3d2990a8360d97a4ad5792c4b248f1dca03497f1679be91533cf3320de1f9be0`
`font_01_sfnt_off00007941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7941	10252 bytes
SHA-256: `9dfc1702a392cd2062b9fc30c1eb12cbacb53dd0caf1a99f28a7b020b7bc7956`

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