Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56156d8cbf8cb52…

MALICIOUS

PDF

33.1 KB Created: 2020-10-22 14:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a56c805400c6ac2ed6d19bfa307e0a4 SHA-1: ce0b3614dd99ffc51f38132955e6702201061b31 SHA-256: d56156d8cbf8cb52df50f83482d9a94340cb1c99b7184766c1d6f33254a9e37f
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=limit+ygs+t%25C3%25BCrk%25C3%25A7e+soru+bankas%25C4%25B1+pdf+indir In PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f9008560e418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f90dc9123095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872f157a487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f8f8526f0ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87d4cf7e865.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/33639129-18cd-4c6f-96e0-90d4f0a868d6/pizusog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd37085a-95e2-4e0b-81dc-ca7c1a214fe0/nosuwovufizujazofizever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1503aa4e-8c43-4ab2-a532-aa1b73b19d89/sutazawenosezavilegifeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf43917-dcf3-4bbd-b3f6-f52b3278b1be/the_brightside_lil_peep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c691e8-de63-4a9f-b2a7-b927b15fb236/budakatitizowusunev.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/vanaspati_shastra_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/uncaught_open_in_new_window_blocked_by_browser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3308/2014/files/pmegp_online_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9405/8158/files/finley_school_district.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 5912 bytes
SHA-256: 10a17e58e306a1d19dfacc9e36ed3877706b284590ea53881ede778f87c30d08