Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed37b7b317522bf…

MALICIOUS

PDF

45.1 KB Created: 2020-10-27 23:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: df3e6fab7cbf5ef487851df7ed0efa4f SHA-1: 164efd20d207e5c464f1595ec74788092c5ff02f SHA-256: eed37b7b317522bffe1a518bc05287bfcdb65cc4e3fc53a65ca0b2f34eb1aaf7
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=the+keeping+quilt+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5f947af0d802b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f874ba76a972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f906a697b7ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f8a28d829dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5f984eac54c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f88bb5de518d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f97c90612dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8899f4137f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5f9538c8ad412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f876cd7eaf0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f90eb3e77af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f8ed7764f400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f94495fed1ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8762ae675bb.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/lamoridixudenofex.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/2487772.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/96aa10dd9e4.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/1591323b-7377-4bca-81af-c2fd12feaf80/fofabowegirolegipij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03cd0f64-aad7-4334-9457-519c443c8623/84127660412.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_off0000708d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 5472 bytes
SHA-256: a4a9d4a7922a128e6ddb3b23eb0a072812748644b988f4f4460f03cfb1d6f91d
font_01_sfnt_off000082ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 10496 bytes
SHA-256: 5e959bf73d343f237574aab0d9afb23cdd799bb8faab449da3f92d5b4a196787

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