PDF malware analysis — malicious · 3715659f0727f520

MALICIOUS

PDF

51.7 KB Created: 2020-10-26 20:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: cb035541385227e2532a58a53d021f6a SHA-1: 381fa960e73b5d4f891d55b67508a1c7de11e726 SHA-256: 3715659f0727f520ee7a1edb6ac7ab3ce730787cfb34420787c66f7db8622b9e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a malicious intent to direct users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'metric mania conversion challenge worksheet answers key', suggesting a lure to trick users into clicking the malicious links.

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 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.
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.me/123?keyword=metric+mania+conversion+challenge+worksheet+answers+key In PDF document text
- https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/kefafeziripug.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/pezakumapeloni_ripokus.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kezanerodewukew-sijulamigikizox-vutugimun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403681/normal_5f96b87c6a0dd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392444/normal_5f8f6bc7a85a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372963/normal_5f9339a4ef88d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367013/normal_5f89ae99cf27b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403129/normal_5f92f6b5a0f7a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/ayurvedic_upchar_in_gujarati.pdfIn PDF document text
- https://s3.amazonaws.com/zuses/history_books_in_urdu_download.pdfIn PDF document text
- https://s3.amazonaws.com/janodojivi/kugikukezineperewe.pdfIn PDF document text
- https://s3.amazonaws.com/gopuze/solving_compound_inequalities_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/82795145892.pdfIn PDF document text
- https://s3.amazonaws.com/zinudipir/variable_valve_timing_technology.pdfIn PDF document text
- https://s3.amazonaws.com/serogajugomiji/the_tempest_william_shakespeare.pdfIn PDF document text
- https://s3.amazonaws.com/sojuravewi/bikini_body_guide_nutrition_espaol.pdfIn PDF document text
- https://s3.amazonaws.com/tudawufed/biochemistry_textbook_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ffed4a31-5fc0-473e-a9ae-8fd5509ba4ca/91345566019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a3d05cf0-895a-41e8-b66d-4f43a6704811/32753995264.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1a76a3ed-66c4-4ea4-b750-214f90e19ed5/ronco_showtime_rotisserie_4000_manua.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e0eb4744-8fe0-42fe-9a82-14b288793250/jagato.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/65461161063.pdfIn PDF document text
- https://s3.amazonaws.com/vuforewebub/gedosuvoxemi.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/baxezifalavifo.pdfIn PDF document text
- https://s3.amazonaws.com/pezofut/architectural_drafting_manual.pdfIn PDF document text
- https://s3.amazonaws.com/wunupalezozerud/basic_electronics_vtu.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_off00008950.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8950	5536 bytes
SHA-256: `9f97f64c920ae35fedfa797d1f5756d6896eb69ad85b0354348fc24b7cad5b54`
`font_01_sfnt_off00009c1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C1C	10740 bytes
SHA-256: `38b02e4e60f685e2ad4e14ccf6627e865f3e8093d86241f8cc12a5a4f10d24f6`

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