PDF malware analysis — malicious · bfbd3e3d6e2ff69f

MALICIOUS

PDF

42.6 KB Created: 2020-10-29 00:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: 029c46c6bea0c35b6a04e9430cd3b3f6 SHA-1: 8fbfb3166782c5b5589f3e34a7f200e9799cffa2 SHA-256: bfbd3e3d6e2ff69fbece32f3dafe591f1621677d5353a2c9550750da5a5f41de

134 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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://cctraff.ru/aws?keyword=cell+specialization+worksheet In PDF document text
- https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/58a5f3b.pdfIn PDF document text
- https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/2661374.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402964/normal_5f92f6eba2a1d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366304/normal_5f95e2a53d7f9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386330/normal_5f9506c40b8a9.pdfIn PDF document text
- https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/xudokakisiwediziju.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/d79a204e-1bd7-4939-a469-e13069ad79e2/dobelojidunixetogan.pdfIn PDF document text
- https://s3.amazonaws.com/bejeseja/nabagadunitezufafusifawu.pdfIn PDF document text
- https://s3.amazonaws.com/lixasifasi/encyclopedia_of_life_support_systems.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b8b8110c-5fb8-40eb-a7cc-3019cb775695/66023359988.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d235babe-d0e7-4e8e-bf08-5e7de3e54644/10101116286.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f6b3721-161d-450e-a8a3-924917e0785a/62392160763.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7f58b6a-9ce7-490c-9163-9c0be6419289/resenas_de_libros.pdfIn PDF document text
- https://s3.amazonaws.com/niporofez/81290932132.pdfIn PDF document text
- https://s3.amazonaws.com/rozebofukixus/pezexadonenabup.pdfIn PDF document text
- https://s3.amazonaws.com/pusolefosex/92633846737.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/ruwoki.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b7c5f3b-7da1-4287-81a0-902845448b22/58148772404.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_off00006864.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6864	5132 bytes
SHA-256: `616cacc371979a91ee271d799afd0c2f093fea427e109a4a9b1fb1e7f6c6a6bb`
`font_01_sfnt_off000079ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79EC	10576 bytes
SHA-256: `78e77a3c458c1f5f197b1e33f7913e2ff9b1d48519e659c48e924a02e07f2d4b`

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