PDF malware analysis — malicious · 1fe58fa96bb98f2f

MALICIOUS

PDF

157.7 KB Created: 2020-10-28 02:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: f4259313129670946c2e26091789300a SHA-1: bc24e7ff4374ec4cfeaba3e7da81a8c9f2a0bd78 SHA-256: 1fe58fa96bb98f2ff05a1bea11058cefa9aa1ee4ac5af40ffc328dea4ef3b36c

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=sql+developer+17+user+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's part of a link farm hosted on disposable domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 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=sql+developer+17+user+guide In PDF document text
- https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/juwepakotonexipotig.pdfIn PDF document text
- https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/xotoririzefuz_pakujexukuxew_gateleb_fogosoruli.pdfIn PDF document text
- https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/vulovotigawizu.pdfIn PDF document text
- https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/08a2d4982.pdfIn PDF document text
- https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/5637467.pdfIn PDF document text
- https://siregudak.weebly.com/uploads/1/3/0/7/130738759/689284.pdfIn PDF document text
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
- https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/c21d2e5506da8.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5371308.pdfIn PDF document text
- https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/4b26c3b70bbd7a.pdfIn PDF document text
- https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/3d4d22.pdfIn PDF document text
- https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6018413.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420434/normal_5f9865650bdd5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383451/normal_5f98a26ab4f09.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374366/normal_5f8fc71aecf99.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419451/normal_5f98a2fa868fa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404293/normal_5f976698a9b33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383801/normal_5f9844a8d6593.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393624/normal_5f9148eb7c711.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/91242cdf-c797-40ac-9bd5-14d81a53a181/51107959213.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/56b2f5f7-34b1-4902-b3a0-aaac90d300e9/31666070273.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d1eb11f-df59-4d28-a5fd-1f9c60f12d63/84934563341.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c4e7e538-b932-42f3-b35e-b8e547a660b0/89018984621.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/533c2170-5b14-4332-95e4-2fd5f9852f29/wasoloxalipilinamir.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_off00022d72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x22D72	5340 bytes
SHA-256: `d91f99be586e7b9d67194da2d56881beacbc27d3488e3a317c55221ff20fb4fe`
`font_01_sfnt_off00023fb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x23FB6	11916 bytes
SHA-256: `37465cd1f9d0b0e77414ee77d70a9ba9037cafe21b24ac5e217c5fded48cc170`

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