Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bac53e79fb46a15…

MALICIOUS

PDF

20.6 KB Created: 2020-10-31 13:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cc03804f01f9276ca43acd3d7466e15f SHA-1: 6af9e86b71992a4a40230d72079f5d2a87013946 SHA-256: 4bac53e79fb46a15d54b24df4533ae4a590d3b834553bc0c4d3fbb033dad22e1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though partially obfuscated, also contains the URL 'https://gettraff.ru/aws?keyword=cantos+de+ofertorio+acordes', suggesting a phishing or link-farming scheme. The presence of a link farm and a malicious redirector indicates a high likelihood of user redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gettraff.ru/aws?keyword=cantos+de+ofertorio+acordes In 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/5646ef7c-db1d-407e-a0c7-92dccae8e063/mowufunuvawarogimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7026/2202/files/22867399293.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/couch_to_5k_6_weeks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5d6077-993e-459f-ba90-5ec0439037d4/tututepexosezapodiraru.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tales_of_the_arabian_nights_book_of_tales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef527304-411a-44f6-92a0-429fbf14aa68/porubumogakusujiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cdbe29-6c4f-424a-807e-679fb7ed815b/11745438637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4c1f65-1117-43fa-9fbb-ce4c439b28bc/malesox.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/40202262016.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/jansport_digital_student_backpack_rab_sylvia_js00t69d0be.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826b0a2c-77b7-4c15-b628-417d753c3af7/21322547200.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/pdf_ebook_reader_app_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5100855a-7e3e-42ba-86e5-7f42a4adf05f/33565335103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f112ea8-724b-4542-a442-b88432964362/94271679831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eca0fa6-5e1d-4e5e-9ab4-d84f2765ac9a/lifijozurekovuruvurulil.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_off000045a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45A3 4888 bytes
SHA-256: 7ce26824d723cd9ca8d9843f354491e515c6bac256c28fb583996020fdb61098