PDF malware analysis — malicious · e3b5eb51d9c77b95

MALICIOUS

PDF

45.1 KB Created: 2020-10-17 13:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 67b1c42cc328f945747f0b64c29f8ccc SHA-1: 02b58a07719fd167083f34c6ddab2ae6c43aaa4f SHA-256: e3b5eb51d9c77b95a4efac55eaa9156eeee3d52d9b263acb5afa916be91f9eca

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, identified as a link farm, designed to redirect users to potentially malicious infrastructure. The primary redirector URL is https://gettraff.ru/wb?keyword=laporan%20pendahuluan%20atresia%20ani%20pada%20bayi%20pdf. The document's structure and the presence of numerous external PDF links suggest an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection campaign.

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/wb?keyword=laporan%20pendahuluan%20atresia%20ani%20pada%20bayi%20pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4366371/normal_5f88239ff4047.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369923/normal_5f884aedc986f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f491a6777.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365649/normal_5f88013102035.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379970/normal_5f8ab297d3a7f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369494/normal_5f892cff66830.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369933/normal_5f8998e69b32b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368768/normal_5f8a8985a1d28.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366312/normal_5f872b1ccd83f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373779/normal_5f8a6c189daf7.pdfIn PDF document text
- https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/912726.pdfIn PDF document text
- https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/dubesiguk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370064/normal_5f8864f705dfd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368745/normal_5f883db3568a4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/fb6a24b2-42e3-4739-bc6b-da62f2ba502c/felesawoxukavupute.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b3d4a27-8383-45b2-94b5-11c4f608f265/sagoxuro.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2a85e5d-6b6c-4147-b113-a6f985486ac0/rogebabumozemupug.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/42821dc4-2969-4094-a688-d4d8422a8b79/mevejuxelikapozilote.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3939f0da-ad15-4301-9d5f-419eba75609c/535952722.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/58f1670b-4faf-47bd-8b51-bf0f2b2672cf/tunuvow.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9c422d96-f0a9-4f5a-8088-50af736ad4ab/rulipobawutoporefudijen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/80bd74fe-2192-46ea-b80a-045ae8126c98/7008511604.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8ac67818-e5bf-45aa-ae13-e02e80e7c4b1/77182604936.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000718e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x718E	5312 bytes
SHA-256: `7665999c2e8a4bba6696dd69062be3f03eec783ba3d2f71eecf7d26216d75f15`
`font_01_sfnt_off00008393.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8393	10324 bytes
SHA-256: `737db10ab9af56178068f38ef6bcb21722635b7506255179af92a81679c764f1`

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