Malicious PDF — malware analysis report

Static analysis result for SHA-256 107cfb1b24ac2cee…

MALICIOUS

PDF

48.4 KB Created: 2020-10-28 09:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 164140f4c748bda4621b9221fd3e40f4 SHA-1: 03e043baee529091247ad461f0a6aa8d182f91d8 SHA-256: 107cfb1b24ac2ceed3f80c53f56f36a53a48279ab194f66c25621a355cdc5bbc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://gettraff.ru/strik?keyword=how+to+draw+a+table+with+food. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links pointing to other PDF documents. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to potentially malicious content or engage in SEO manipulation.

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/strik?keyword=how+to+draw+a+table+with+food In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f87ad036070f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8738bfbb389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f91545d5a677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f89a94493562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405639/normal_5f977f18e8066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f89d2122cf8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f90e98558418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5f99120543370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f8efaab59667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f89e6bbbc3e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jotizifime/vebulesegedodimax.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/alex_s_adventures_in_numberland_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/32018355971.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/24522378987.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/arifureta_light_novel_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7682/8318/files/android_scientific_calculator_source_code_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/78419816291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9523/7813/files/12990276901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9612/2561/files/xebegasedonub.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5012 bytes
SHA-256: c45da4e676b3a6984ab554319bd4a1ae19bbb39bf2779dfc50c580a285b268a8
font_01_sfnt_off00007a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 8260 bytes
SHA-256: 14e0fbac1a24910cebf7076c7cf432d1eee157bcb4e1a705381a54b25a34f5bb
font_02_sfnt_off00009104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9104 10372 bytes
SHA-256: 0b31bc67415979ad79a92b6b76b3ac68bca2b14884b1dbf643f1b4b87e0679e4

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