Malicious PDF — malware analysis report

Static analysis result for SHA-256 deed97dab43074fb…

MALICIOUS

PDF

41.3 KB Created: 2020-10-31 23:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 263a84c92e9d76260203c6a805fb0044 SHA-1: c9fe3769127976fa2f22e2e96a00a020b780ba78 SHA-256: deed97dab43074fb2b8a642a0114538e2534f16042df2a5ec4be0256d9965034
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://ttraff.me/123?keyword=cbest+practice+test+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f95bb9641937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_5f96d5b08f17f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f8b709386121.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/1665101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f90b6c234c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f88ca6234a9a.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/3791640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8be79d64426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8e1f35c5115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f94cfbc0f2fe.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/weledusew-finalaneze-vapekiposi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f9a6aad9e36d.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.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/1/0501/9903/6058/files/zelle_app_for_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8814/3039/files/wisidexepakikedilufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4819/8040/files/dixurivunuxazosatagijed.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_off00006373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6373 5160 bytes
SHA-256: 4e284fddd2ea8414d1ec6a485edff1d3fc407558ed27e538beeacd24664b537f
font_01_sfnt_off000074fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 10400 bytes
SHA-256: e981c44ca9f8a0373bcc5648234a8ec61a638abd8e10dc0df41a573162725bbd