PDF malware analysis — malicious · 9a4d4c0a5930fad2

MALICIOUS

PDF

65.2 KB Created: 2020-10-26 04:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 8e737e296944a31f98a393102b24e4c4 SHA-1: 2c794f121d244b95c3443c6e63bb109729b2f3c1 SHA-256: 9a4d4c0a5930fad221abf8ff2185db5d09f9b00951ac740154c56748bcb5f280

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable hosting services, designed to create a link farm. One of the primary links directs users to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that appear to be part of this link farm, suggesting an attempt to drive traffic for malicious purposes, likely to distribute malware or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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=final+fantasy+tactics+apk+free+downl In PDF document text
- https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/jugebibutunurase.pdfIn PDF document text
- https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/669262abea16f.pdfIn PDF document text
- https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/fifugo-xeguliweso.pdfIn PDF document text
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/5519915.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366622/normal_5f91814de9a29.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413226/normal_5f944c7e29691.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369926/normal_5f9516449a97c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383695/normal_5f8f1f5928b7a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380086/normal_5f8d43137aa20.pdfIn PDF document text
- https://mogawurid.weebly.com/uploads/1/3/4/0/134042680/mibimojakodibedat.pdfIn PDF document text
- https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/nefuledapagaji-sibufuzuraw.pdfIn PDF document text
- https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/6061717.pdfIn PDF document text
- https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/laguxek_pugefewemil.pdfIn PDF document text
- https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/bibotizorijawupo.pdfIn PDF document text
- https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/0dd290cc75.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369310/normal_5f8c219511b05.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389101/normal_5f94125d159a2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385213/normal_5f9054d8acb31.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/6c50c977-04d7-4c2f-9e9c-72d3aa8d4916/tedofiwevil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24ae1f63-a246-4bde-94e2-7fcc1259cace/29583587371.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/940b2111-f46f-4e02-8988-e73dd7af0fd1/lakavevunuxetegigep.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/091ead8a-bc5f-487d-a81d-2ed3fdf68bf2/16952301614.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
- http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006e38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E38	5516 bytes
SHA-256: `56f12b681444b58f9da660e429ae4aa27f865582efbba690a0501d2f3aa1d6be`
`font_01_sfnt_off00008170.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8170	5148 bytes
SHA-256: `20afb2893fea53dfc615c0898a2e6012238591e4cbd6fca4176ff637248e5e23`
`font_02_sfnt_off00009306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9306	13492 bytes
SHA-256: `688d80fc9f5296618de005ed9205fd18c25286a6064549922578c00cca2d8201`
`font_03_sfnt_off0000b77f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB77F	15448 bytes
SHA-256: `9bd389660a88f282b4038a5a029cc7ceb1a9b2850e5aac28b5f3fb72dfcaf48d`
`font_04_sfnt_off0000e64b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE64B	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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