Malicious PDF — malware analysis report

Static analysis result for SHA-256 634e62a36640f63d…

MALICIOUS

PDF

54.5 KB Created: 2020-10-16 08:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ac52da4c4781da721ef367a7128efd5 SHA-1: 4ba17b6dc56d58792884adf59b20f178e630c145 SHA-256: 634e62a36640f63d7832eddd36d45344944ed7ce6d17356a2c97dc13f1f34ef5
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://ggtraff.ru/strik?keyword=rutter+guide+landlord+tenant In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f881a9974076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f86f630e6a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f88bcd1a7e3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f88f77b609a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f872b9675451.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/52e46961-d766-4626-adf7-470eb79fcb9f/revigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8ba431-b87c-4065-aa3c-83710a599d29/jipanijoxaponakab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340811b0-4f18-4ebc-99b4-d0214cd51b9e/74271140183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8326/2869/files/zibapuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3540/8576/files/radivesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4461/7885/files/63245655192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8504/6974/files/adoption_agency_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/rock_lobster_family_guy_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7059/5487/files/slenderman_must_die_chapter_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2911/4275/files/planes_of_the_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e114586e-0951-4869-9be2-d9f1b8c3ce34/41932413505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163cb422-bd8e-4a42-8c50-ef488456fdc6/vogifela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcb6b40-1849-4f09-a466-faefe3d8b845/mirejakiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bef08e-8eed-43c0-8361-0a6a13921e27/tezilexawizapivuramome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130b2fda-2ac5-4a68-8c60-2f6029a7485a/dodofubejawaviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4423/1575/files/damenomivebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8253/7896/files/best_dont_starve_together_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/kuta_software_secant_angles_answers_with_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/instruments_of_the_orchestra_layout_worksheet.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_off00009803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9803 4820 bytes
SHA-256: e3a6430391a1be789954e4632e5ed55031d13d2a76f66969fbe371d304a00ad1
font_01_sfnt_off0000a877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA877 10748 bytes
SHA-256: aed9312096658a430137015c82f286dbfd636e794f443328f8df0ca976872638