Malicious PDF — malware analysis report

Static analysis result for SHA-256 504c7dad9c24bf7e…

MALICIOUS

PDF

50.9 KB Created: 2020-10-31 12:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ecd3da5fe577092635d2a3264d4ced63 SHA-1: 4704b60b20905e190f883d1636608d95001879b4 SHA-256: 504c7dad9c24bf7e55f8dd24c36cfb4eba596d8eb8d1bed7b42716639ae9b932
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=diabolik+lovers+ayato+ending In PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/zoguma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5f950561ac1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f8ca1ed583f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8c7f98806e5.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/xivuvafodumovu.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/5a726ad9-94de-4786-a61b-f0b479a36989/zizajabaritevimavafowufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24471936-2bfb-4ee6-9e10-bb8e5cdbf33f/8359273484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7943/2347/files/79477260646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6936/4632/files/91792780371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3646cc-e4b9-4b5a-b72f-05a1eb965d3c/werurusixepabejukot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871a8979-15f7-4c32-8049-e5e898d9584c/a_poder_em_suas_palavras.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_off000088dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DC 5360 bytes
SHA-256: e9f4852a842a68b6cf65b0d5e016e61a519e0f4ef2d0f37477764da3b4b9e68d
font_01_sfnt_off00009b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B32 10428 bytes
SHA-256: 876b8b12ad77ca351ad12f106d43811f6199675d15263a3de31a70c687b11897