Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee60688a8cf8708…

MALICIOUS

PDF

52.2 KB Created: 2020-10-15 20:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: da1af349f8fdbdd3d58dc8711e36a5b4 SHA-1: e1abfa55ad419e2297e9cbc6ed60814849202ecd SHA-256: 4ee60688a8cf8708f0ce5ddd791c9639d64185598c590f2f4cbf0341006f22b7
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=anesthesie+en+chirurgie+digestive+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87109def753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f884cd918758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f872e453f192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f871ed1ae084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87110121169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875d98c2d42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87bfdeaa51f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875401c5f31.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/5832551983.pdfIn PDF document text
    • https://site-1042869.mozfiles.com/files/1042869/58709874734.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/c32f00a4.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/star_trek_new_worlds_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded41f73-c9cd-4a4b-9490-b316090f0afb/jijajaxewuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bb34ef-a287-4539-ae4a-ae1458244ad1/jafakefipapupakipupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69075115-90da-450b-8ef2-439202093f0d/rugewadagugudimosekuweto.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A15 5224 bytes
SHA-256: 0e89b156a904a33c44e557675d34c725fab429a5d7124db5a2c9a91f0550e3ce
font_01_sfnt_off00007bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 16256 bytes
SHA-256: 1798a8bc58a3af5d1e559ccaa4edc5ae955a259472b82c8a9794f30e5059546b
font_02_sfnt_off0000acbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACBD 16112 bytes
SHA-256: 95f2fdc14a2f8cdda26bb26952e7a895a0664b32aa7fdea2361ed6ab83a5ffeb

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