PDF malware analysis — malicious · 488e1782d93cebc0

MALICIOUS

PDF

51.7 KB Created: 2020-10-17 13:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: a50828d88594503b8ebfcfde72029407 SHA-1: 5d289c1de39c495efef4a34793d969f07aa66e2e SHA-256: 488e1782d93cebc03345aa8de2a87f83169adcf0536e179fe9769bb16be3581a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://cctraff.ru/strik?keyword=ingilizce+%25C3%25A7eviri+teknikleri+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to external PDFs, suggesting a link farm or redirection tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious infrastructure.

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=ingilizce+%25C3%25A7eviri+teknikleri+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4369630/normal_5f88de9eb1836.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369936/normal_5f8a5961b9f9d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372673/normal_5f88b685b8759.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375531/normal_5f89d7ff05772.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367916/normal_5f8a1061a4877.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vunud.pdfIn PDF document text
- https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/3c99f7.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
- https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/kepikiwazalaxaves.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://uploads.strikinglycdn.com/files/586cac3e-ddef-4a5f-80ba-897310f2ea7a/33049583386.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0f992ba4-2059-43a0-8a9e-1da9d93e842d/91605677266.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/757dd3fd-3702-4abd-9971-9329094e8ca5/bijibaka.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0463/4139/0492/files/fe_gun_script_2020_roblox.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/1869/4041/files/cellular_structure_and_function_section_4_cellular_transport_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/9406/3269/files/welcome_to_class_banner.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/25d61693-268b-476d-8bcc-c5ad59e210cf/25178467826.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd917f50-4892-4df7-807c-7e66e854da13/pewufezaxumapalameregebi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d053499d-64ad-4b62-9538-9d8606b5559d/12969675920.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec6cb7d2-7042-45a3-ac46-e6c5fd0ef4a7/52242818903.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88bd1769-a5fa-458a-8ba6-af4cde0ddf8e/moragabebomopewapuguta.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ecbee5df-4ff9-4855-b338-d22975f240f4/fekokufa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/873cde9d-47ca-4d2b-bb3c-2ebbceed45a1/15115066039.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007c80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C80	4908 bytes
SHA-256: `8e569d32f5fc41807ad7edfb9e98e8bcaf575d426d61f7091a4c5d722cd4aac1`
`font_01_sfnt_off00008cff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CFF	11828 bytes
SHA-256: `43d8857952ddaee55979f9341185d72421b7300694ccfff554d510adf646a628`
`font_02_sfnt_off0000b14c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB14C	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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