Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86208431f41bad9…

MALICIOUS

PDF

181.0 KB Created: 2020-10-18 14:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8690a3721ce111be4853e5dfc4413281 SHA-1: 8b2d9ccc62777778f54c21cb7a7d0f1a56eeb898 SHA-256: f86208431f41bad90fd43b3196a9a8c4f01b348237373f92ac87d0e1814b0718
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting a harmful site, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cctraff.ru/strik?keyword=life-span+development+15th+edition In PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/1f3725e15044.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/29973.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/volisilitij_luperodebif_vaxulaxolirid.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/99edaf.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/b9b62e.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/jojanofale_kopoz_pijinetotabu_novusaz.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/nukunanejexuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f8b4e3bceb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f8c0bcdb774e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f871c0e8fd8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8714705e357.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8f10735b0e9c9.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zikarab.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/lutadotutaku.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/2079953.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/2986315.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/655733d4-cd2d-4f34-91e9-8ab5a18b6a2b/91247875888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d353090e-1190-4f80-a2e1-32111fd79740/vapafeniroxigabazode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e818dc-c749-4d4f-b4a8-23642051ec71/lenawetozibivuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d176da18-00da-405b-835b-b01faa1d52b2/fawirumijili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdde6ba-a6d0-4364-a925-fcf8229b374c/zukisevorevisonumomimifi.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.

FilenameKindSourceSize
font_00_sfnt_off00028f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F0F 5396 bytes
SHA-256: c7772beed2c1477f699676f46c511985ca719c6523df22a8e072ab029b37ca22
font_01_sfnt_off0002a163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A163 10536 bytes
SHA-256: ab8b0d6c231b817fefae891e5723e65945df648029a09f42be34a6316f24930e