PDF malware analysis — malicious · 8a2bb946580a96b5

MALICIOUS

PDF

43.3 KB Created: 2020-10-19 11:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: db7dfb211217e76e7e8dbe8a34f8ebc2 SHA-1: b73757b190e31da6700408487c4ee5aefb6d3e74 SHA-256: 8a2bb946580a96b59a4b0a6fa32a218da20403a89456558a2b96c7cd9490a862

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://cctraff.ru/123?keyword=two+step+equations+worksheet+9th+grade In PDF document text
- https://cdn-cms.f-static.net/uploads/4377379/normal_5f8bb1575c785.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369777/normal_5f88628d88548.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371244/normal_5f894833ca13f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373983/normal_5f89247e8c2a9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367903/normal_5f87653e536ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380211/normal_5f8bfc5409fcb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369502/normal_5f88b936cc5d1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367674/normal_5f893748bdbdd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365608/normal_5f870919e0181.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365549/normal_5f8b15f557447.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365591/normal_5f86febbe9680.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b59a2e488d.pdfIn PDF document text
- https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/7171346.pdfIn PDF document text
- https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/kirosugubejakuwek.pdfIn PDF document text
- https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/venonapeburiwi-gegotulepiki-jopix.pdfIn PDF document text
- https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/muvinovozo.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
- https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/boxetux_kujidisebig.pdfIn PDF document text
- https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/nukusefimeta.pdfIn PDF document text
- https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/2625609.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/ce20cf04-fe99-47ab-8971-845f19cace0c/vijajupizi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dc1ba8bc-07df-42d3-bac5-269edf06da9f/vedivatujugato.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee1ce79f-d42c-4d9a-8bc1-9a37ce552e83/economic_issues_and_policy_6th_editi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ac4074b1-df53-4179-a126-664470ef0bea/69891686647.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/47393563-e994-4604-88a6-7dd52bdd3e22/falezolemigikelalabama.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_off000065cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65CB	5576 bytes
SHA-256: `d2cf85556d8c866bc5f83a66d883d8e04d60c3b73d8d7db273f98e69d820cab5`
`font_01_sfnt_off000078c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78C0	10976 bytes
SHA-256: `9399c8c5afde96ae31e8f1f4a5820be06667415ec51c91e989f0a8f95cea26ac`

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