PDF malware analysis — malicious · b46d83f66fcf03e5

MALICIOUS

PDF

40.1 KB Created: 2020-10-08 09:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 22d0c4a3461474c192784f3e8b8d43d4 SHA-1: b0ed79edb5e47af059eb13dc077b9c9630195199 SHA-256: b46d83f66fcf03e5db0296c629a361f7c996336719ddad49501aa77d6dde0965

184 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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://ttraff.cc/pify?keyword=upenn+political+science+major In PDF document text
- https://site-1041845.mozfiles.com/files/1041845/49765830462.pdfIn PDF document text
- https://site-1037846.mozfiles.com/files/1037846/21794745441.pdfIn PDF document text
- https://site-1039889.mozfiles.com/files/1039889/betimudajesasar.pdfIn PDF document text
- https://site-1036950.mozfiles.com/files/1036950/13942793269.pdfIn PDF document text
- https://site-1037191.mozfiles.com/files/1037191/93858154592.pdfIn PDF document text
- http://files.nexustechno.co.uk/uploads/1/3/0/8/130874296/wijexosinotuj.pdfIn PDF document text
- http://files.allaboutannapolis.com/uploads/1/3/2/6/132695701/lojemu.pdfIn PDF document text
- http://files.lacluenvironment.com/uploads/1/3/1/4/131408142/f0aa32.pdfIn PDF document text
- http://fakum.thefountainchurchofgod.com/uploads/1/3/1/8/131856194/2008289.pdfIn PDF document text
- http://topupuz.villagecounselingcorner.com/uploads/1/3/2/6/132682646/fukib.pdfIn PDF document text
- http://files.newportboysnationalschool.ie/uploads/1/3/1/3/131381919/tamot-rufolak-kawazil-zivegajebofow.pdfIn PDF document text
- http://files.unionheightselementary-carthagetn.com/uploads/1/3/2/6/132696210/negubewuniber_vuwijuvu_ruwelu_nezunu.pdfIn PDF document text
- http://files.longchronicles.com/uploads/1/3/0/7/130776503/2426798.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/7556/2400/files/finapeg.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0494/3685/2391/files/city_of_fresno_building_department.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_off000060bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60BB	5148 bytes
SHA-256: `c829a7a8d9860635a072bd2ffb0e44f9e8a61b41dc10173e6614afbd12b0783a`
`font_01_sfnt_off0000722a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x722A	9764 bytes
SHA-256: `66250098cfac2265e524c72918607fb06aa44ee2376e97ec1ab2285d9bb89237`

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