PDF malware analysis — malicious · 81e32f00a9af6100

MALICIOUS

PDF

51.6 KB Created: 2020-10-25 04:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4619493eb06e4d8dde950e71ea41c0f6 SHA-1: 2bdad59e7be52a50d0f7eaa0057cb3aa68b0d10b SHA-256: 81e32f00a9af6100186467960892963468ca0f18f4834d3f1f9b85438670e899

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to benign content, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure.

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=civil+law+and+common+law+comparison+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4366024/normal_5f8b43de54585.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378606/normal_5f8b6c476a4e8.pdfIn PDF document text
- https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/bokufubu.pdfIn PDF document text
- https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/811c5bce137c.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://uploads.strikinglycdn.com/files/32aaf6b9-3918-40cd-9aa7-7ca468196d3e/youtube_tv_streaming.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/573ad6ac-2076-4246-b1a9-73d950599187/mufukezijo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c0583ebf-53e0-4000-a5b3-1cd2a2031116/95158367428.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/faaaefe0-f3f8-4d26-9ac7-e729b7cc1c32/enhancement_shaman_pve_guide_3._3_5.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1ea74b9c-db7d-46b9-a1c3-408df40c5b9f/fairy_tail_vs_one_piece_1._1.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef3785df-f38e-4bef-bfbe-9855859c345a/55080309352.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41a1da00-c785-44e5-8f6f-e129987fb901/tewemafobijanelimojunaxab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cbf8fd74-17e3-4669-9172-82e4143e42df/92478307533.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e97ffcd6-3e48-4e80-9d33-3f9d0ee8f920/gojekefetemigume.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/086e9e17-ebf6-4863-9113-4e5284390183/lumukewuzuwofetamupozafu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e5cc09bf-f66b-4c7d-a413-3f9940c42461/fowibubumititakumeletap.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/98d9ae77-c1d3-4d15-90ad-7d3da40ab7b6/nuvif.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/476d124d-5c51-4736-89f7-3a0477dc29b2/48977617130.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/3647/2992/files/wodusuga.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4283/1522/files/youtube_video_downloader_for_android_videoder.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/8821/0840/files/wepabibupe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4548/5725/files/71255781238.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/7829/6746/files/birotabemufevonezevotera.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_off00007c9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C9B	5064 bytes
SHA-256: `456b94c904de1a1a6434410c0cf5252a5b415809fe784ed514036a6cf0d07e32`
`font_01_sfnt_off00008dba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DBA	11128 bytes
SHA-256: `5f4623cc0db5238ee3f609baab910234843d5e1bfcc650fa9d84e09a2026efb1`
`font_02_sfnt_off0000b257.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB257	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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