PDF malware analysis — malicious · 4a3e475630d97f80

MALICIOUS

PDF

75.7 KB Created: 2020-10-28 15:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 1d27f6ae4ed91fd2bddac2bc5e28f4ff SHA-1: 6ddf4b21ff190c3d9c8c8e099729f5b915811a63 SHA-256: 4a3e475630d97f809edecfcf9f05f59dff684c75f36db4ec9324e5457e3b457e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which are likely SEO-manipulated. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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://ggtraff.ru/strik?keyword=demi-fiend+dnd+5e In PDF document text
- https://cdn-cms.f-static.net/uploads/4365607/normal_5f881ff1edb57.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390071/normal_5f8f8cd0055f9.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387928/normal_5f98a35bee966.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408701/normal_5f96e93d5aa5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367302/normal_5f890adfb89f9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386361/normal_5f994f56d1a3c.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/1/0434/0082/2934/files/27105909579.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8320/9633/files/lego_dimensions_unikitty_cloud_car_instructions.pdfIn PDF document text
- https://s3.amazonaws.com/potevip/super_miami_hotline.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/7777/7061/files/prepositions_of_place_test_with_pictures.pdfIn PDF document text
- https://s3.amazonaws.com/jarawaxanivu/vocabulary_role_models.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3318/8762/files/national_appraisal_guide_for_mobile_homes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/8697/7441/files/magnus_chase_hammer_of_thor_download.pdfIn PDF document text
- https://s3.amazonaws.com/nerugiraxura/south_african_constitution_chapter_2.pdfIn PDF document text
- https://s3.amazonaws.com/jozetej/equations_of_lines_and_planes.pdfIn PDF document text
- https://s3.amazonaws.com/petuzutemixuvod/lotodilubapa.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/wimubib.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/biografia_de_cesare_lombroso.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000caa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAA2	9468 bytes
SHA-256: `78f4fef22d74f71050e17740a350ea6c69f05cf3a2cb9ed69e4bece579c4a99f`
`font_01_sfnt_off0000ea0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA0B	4692 bytes
SHA-256: `27304e339832680c843eb829ef5d2af261797793e741946d09b11bd4f12eb2e9`
`font_02_sfnt_off0000fa06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA06	10824 bytes
SHA-256: `659a7be29033301680623f8012a5bab2348a555b5d753de6242e96ad116eee10`

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