Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bc65738e4df043…

MALICIOUS

PDF

50.1 KB Created: 2020-10-25 21:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e00a9edf3bb0c3ed62a8fdf60fdfd3c2 SHA-1: dd2aa4b9d4e8f6eb1283f3eead53a7b782618d86 SHA-256: d7bc65738e4df043ad3a03617d3c616743f7fca533f11b74ed69e3c7cd03668a
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or appear to be part of a link farm. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to harmful content, potentially for SEO manipulation or malware distribution.

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/aws?keyword=blogspot+pdf+kitap In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f880c9e9ce07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f8efaab76e0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8fe27944048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5f8ecedd222a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f89b6d4c7e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f89440bf1572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5f91e6d18fa6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f8acbd50f848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8ba137b6869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f8e5b1aec6b4.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/1f876.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.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://s3.amazonaws.com/zuxadol/catgut_simple_y_cromico.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/total_azolla_zs_68.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a084c93a-5e97-4270-8a8b-d3072e9e7bcb/17112560172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee5edab-895a-427d-b8db-a3ac6290379a/sinojigulatixeliw.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/color_by_letter_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/cdr_file_convert_to.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/streamline_english_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sindrome_de_cordon_umbilical_corto.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.

FilenameKindSourceSize
font_00_sfnt_off000077bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 4792 bytes
SHA-256: 92c1335f4f70b977edb9b096850e1dab50808c170c47a3a40511708f6a9c9b49
font_01_sfnt_off0000881c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881C 10980 bytes
SHA-256: a071decb08f33f71a46320f5a92b8fdbd87a81c7f9e4664c7f856cdff0dafeb7
font_02_sfnt_off0000acd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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