Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6204fcdabb748b…

MALICIOUS

PDF

46.6 KB Created: 2020-10-31 23:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a8bf69046a96c74a81b2ff6bab9e0a63 SHA-1: d8da88e29199afedfdd29add867cbd7095739ef6 SHA-256: aa6204fcdabb748b6343ea26caaee68dc932922ad120eb788842f4054064f4eb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=baby+alive+food+packets+printables In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5f999f83c41ab.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/gusixolatigovuzap.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/bunup.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/fc60b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f98e1d3d0396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_5f9b1b6e2de8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5f9dc609144db.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006d3a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006d3a.bin)
    • http://fedorahosted.org/lohitIn extracted file (font_02_sfnt_off0000a32f.bin)
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/xebuxaxagaziwuxiwiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6202/4123/files/24154696056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/9854317581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4692/0103/files/how_often_does_the_calendar_repeat.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 extracted file (font_00_sfnt_off00006d3a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 5564 bytes
SHA-256: 229da263ce073721678569406eb6e6ebf0cca9d283b6be2b8319b51ec4818658
font_01_sfnt_off00008041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 10512 bytes
SHA-256: 9512160a383d5d0b28c6708820c3a156036fb74d59d1adac014d1352a47b32cd
font_02_sfnt_off0000a32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA32F 2572 bytes
SHA-256: b47cde3f6973867bb39891fbfb912ade2e92966f9b7ea327dd49d54ae6fadcef