PDF malware analysis — malicious · 67a69668e00059d4

MALICIOUS

PDF

49.2 KB Created: 2020-10-26 02:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 67a979199b167b6fc3e81623cbee2385 SHA-1: 82f05f5d1488b8fe56053630dc27583ad82d52bc SHA-256: 67a69668e00059d4618b3e7112c3a7cf40e20b18da307338bcbcf7bdae867b49

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, indicating an attempt to direct users to malicious 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://gettraff.ru/strik?keyword=someone+like+you+sheet+music+with+letters In 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://uploads.strikinglycdn.com/files/f7ea9702-86e6-45c1-8646-d60d68e3f228/dedozifesiva.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/03c8797f-f1f7-45f2-a9f1-56136ae2abca/nebosh_igc2_examiners_reports_2018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e8bbef2-eef1-44fe-bad8-c9995ae161b0/1650711190.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/10297218630.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/42822659672.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6118dab1-fc63-48c1-8ac6-feaf91014f58/fikugefifupel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/33af6993-97a5-430e-aaae-4ce50c562526/7691649801.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/930ebc72-3f3c-4829-afa2-6ac908ad5887/gupuvujozegovukozepo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0119b3ed-b48e-484a-8c20-4f8d9ddc68ca/soxepimeberizabidevolulow.pdfIn PDF document text
- https://s3.amazonaws.com/zugutixe/qasida_al_burda.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/66162057247.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/8723/1674/files/47327845662.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3318/8762/files/anonymous_browsing_app_android.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8222/7617/files/minecraft_sky_kingdoms_server_ip.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/centrifugal_pump_maintenance.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/erico_cadweld_molds.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/ciencias_facticas.pdfIn PDF document text
- https://s3.amazonaws.com/levumoduf/guwaxuludisadaxare.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/cambridge_english_worldwide_starter_student_s_book.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_off0000727e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x727E	5072 bytes
SHA-256: `ad0893bc34acc438fb15e8ad4299821c80e0d8e02b2d3db55e04d0cdaabb42f5`
`font_01_sfnt_off000083a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83A3	12432 bytes
SHA-256: `c2b6e64240e00a64454eafd95e316e6b0f3b70dca5d5c935fac9ed1b1a46346d`
`font_02_sfnt_off0000a8c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA8C9	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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