PDF malware analysis — malicious · b2f25b87aa6c56a1

MALICIOUS

PDF

62.5 KB Created: 2020-10-26 23:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 1ba8c7252fcee552b8d98be0a3a2ca26 SHA-1: e26594fc9c8ebb58d10ff4bba6a0808cdd33abd2 SHA-256: b2f25b87aa6c56a14306fc74570f49ea45d174658fdd8b0cf80c3c45ff5de8be

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many of which point to redirector infrastructure designed to lead users to malicious sites. The primary malicious URL identified is https://gettraff.ru/123?keyword=buddhahood+without+meditation+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain the malicious URL, suggesting a lure to trick users into clicking on the 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://gettraff.ru/123?keyword=buddhahood+without+meditation+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4366317/normal_5f873fa002d79.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366357/normal_5f8727f5d923d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383794/normal_5f8f38e60b0e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384461/normal_5f90d082b5f1b.pdfIn PDF document text
- https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/3319342.pdfIn PDF document text
- https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/5c34abe51.pdfIn PDF document text
- https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/todidudivonedi-bimuzojoxuke-kibamabutal-dakaned.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/muxegeza/e_waste_management_rules_2016.pdfIn PDF document text
- https://s3.amazonaws.com/regegozumekoza/fududesizejuk.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/23666879564.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8016b6a1-1132-4a28-823f-0cbad3e466c1/xuresafiriruxenewefa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31dc2120-9028-4c3a-9983-f5d268ee4850/11817301134.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/adeaf7d8-7af5-437b-80b0-b343e01f37a3/81368427573.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b0ac1c3-5099-4682-9f4c-813f619f444d/5078240213.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aafb704c-8dcb-4967-abe7-849564d5b371/99394317221.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7dbb9251-df6f-4db4-b893-af5a6fdbd3db/68542548714.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05c3d357-6e10-400a-aa7d-d3a85c30bf9b/gumafi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/5865/7430/files/35441765098.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0494/2263/1067/files/download_summertime_saga_0.17.5_for_android.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/0388/5737/files/what_is_waveguide_dispersion_in_optical_fiber.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0477/8305/1431/files/33627659106.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_off0000a4dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4DC	5000 bytes
SHA-256: `8a50ce17629952363552313728c5506b3c4fff5427c890e6ea57c29df9fb41cc`
`font_01_sfnt_off0000b5ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5CA	12260 bytes
SHA-256: `1dc067e5e3bf8684cc7b0f4084758c9da68e03fc547e32c646f71269b86d3d87`
`font_02_sfnt_off0000dc82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC82	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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