PDF malware analysis — malicious · 96b373bb1b89dec8

MALICIOUS

PDF

55.7 KB Created: 2020-10-29 13:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 27432e811f67fe9180b5d5e534340feb SHA-1: 819a1e82a83072c559aeade40991590aa96322a4 SHA-256: 96b373bb1b89dec8f2479ce7d7c8c7cd777b461487ff92f73a8d0b74b44ed8b4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=to+whom+it+may+concern+capitalized+purdue+owl'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a phishing or redirection attack.

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://cctraff.ru/strik?keyword=to+whom+it+may+concern+capitalized+purdue+owl In PDF document text
- https://cdn-cms.f-static.net/uploads/4367959/normal_5f8d4f6c5242e.pdfIn PDF document text
- https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/kebasubeb.pdfIn PDF document text
- https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/xonat.pdfIn PDF document text
- https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/biwozonanijaluzolu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369152/normal_5f87e7bd7e2c2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388612/normal_5f9546eed42fc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366033/normal_5f946cc4b01ef.pdfIn PDF document text
- https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/nipozum.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://cdn.shopify.com/s/files/1/0498/0054/4418/files/wubobukapiduliginisarobo.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/78626465512.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/5407/1445/files/resolver_los_siguientes_triangulos_rectangulos.pdfIn PDF document text
- https://s3.amazonaws.com/felasorarabipis/toyota_auris_2013_user_manual.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/narugifugukiwinazenopun.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/2070/9798/files/69119044362.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0508/1520/5549/files/cheat_engine_android_root_apk.pdfIn PDF document text
- https://s3.amazonaws.com/bokofapig/adhoc_sensor_networks_notes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/5935/5041/files/8942051190.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1136/6309/files/79024317467.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0480/5322/3588/files/85165388053.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/physical_science_concepts_in_action_workbook.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000714e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x714E	8148 bytes
SHA-256: `4245b7807bbdda8149326070867d3040a2e3b04713606042521b4a0dea08b9eb`
`font_01_sfnt_off00008c6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C6F	5212 bytes
SHA-256: `5d7cc6d56750052909bae75cfd4f5795813a59f8fb2f48670edae05209eb35aa`
`font_02_sfnt_off00009e0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E0F	10612 bytes
SHA-256: `d969ff7cf31fd98bbd9a1695b72b8861c007fbc27bf5c6127957a716dbc1f5c9`
`font_03_sfnt_off0000c0ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0EF	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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