Malicious PDF — malware analysis report

Static analysis result for SHA-256 433ce3fca0796860…

MALICIOUS

PDF

39.5 KB Created: 2020-10-15 16:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2420fc4ea4aa7647828de00c25303b17 SHA-1: d9ac83267bcdb31ac7f256cac369a801c0298925 SHA-256: 433ce3fca07968603e476ea36ee396c5fa85146ca65e2cb54aa3a59f84b6ed9c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=discrete+fourier+transform+books+pdf In PDF document text
    • https://site-1041860.mozfiles.com/files/1041860/30134493669.pdfIn PDF document text
    • https://site-1042892.mozfiles.com/files/1042892/11684516823.pdfIn PDF document text
    • https://site-1038758.mozfiles.com/files/1038758/40835555551.pdfIn PDF document text
    • https://site-1042442.mozfiles.com/files/1042442/62145435818.pdfIn PDF document text
    • https://site-1040175.mozfiles.com/files/1040175/50170774494.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/winalosemasi.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/beponuki.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/8058607.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f86fac7b98a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f875654cdea8.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/d84f3fdc-7e0c-4c89-ac91-6c316e4d10af/63990432035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bfe997-df21-4917-a928-136fca6e075c/57289629734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e4bf69-b7f7-42f7-a826-dba625b07483/76448406032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4168aa-fb47-42b2-8eb2-d1602b233daf/82938793577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5419e4b-685d-46a6-aa44-408ddc5c38b4/bafemabigopifawapofunefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a047548-2136-43d4-be2e-99e0b0bd883e/47185301116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96193a0a-4a37-4fe8-9976-d70bf6afc17b/44681120037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e854b656-f695-436c-9b3f-8e722302830a/9279322871.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 5472 bytes
SHA-256: 2936b60cfdbabf87e9e7801a692e8ca2a9789b852d179eb211a7c424a96d8a3d
font_01_sfnt_off00006e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 9928 bytes
SHA-256: 208ef48a329e26e970d5c883fd296b6c01698d49d1d7b86150523fa46fecc8c3