Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf054ef15a67fabc…

MALICIOUS

PDF

39.1 KB Created: 2020-10-29 17:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 729412fbefa3cef8f78b660e2bc90dd1 SHA-1: e8333ab080a56879dd396e52b86aeb477d69e561 SHA-256: cf054ef15a67fabc713e6d80545a423f202f241bd327639bcfe7abeaaec5dc33
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://ttraff.me/123?keyword=adw+launcher+ex+1.3.3.9+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f8e806aa321d.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/dosukakibax_naludemewa.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/1/0503/3944/6969/files/97077695610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0851/4974/files/angina_de_pecho_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1429/0069/files/50563911048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4001abee-9f1d-4730-bc34-1b66486ccf56/24471854227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6200/0299/files/phantasy_star_online_gamecube_mag_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8021/3170/files/46906336542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a7c910-38ed-45de-bf27-9bef885a3b04/fexojesozukigewibiwavim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8375/2128/files/nonuvegomajosemavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/81071279169.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_off00005924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 5600 bytes
SHA-256: 53528c9224a17399512edd84c06e0b96418545c476480851633e8d8d5313bd6c
font_01_sfnt_off00006c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 10528 bytes
SHA-256: 2a47d736b7796178830df56a5013ca8cc66b1c3a0b39125c7096a2b04a352a73