Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9bc87bc16b8987…

MALICIOUS

PDF

42.0 KB Created: 2020-11-03 03:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d43450f5238bf16b26ec88cdfc47d8ca SHA-1: a5e096bad3746bf00bc55ab6a6eaac09aa2ad8c7 SHA-256: bf9bc87bc16b8987edfd77d19c3f00a59218bbe627ee2a7df755eec5de6c6a01
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=jamis+road+bike In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f885e1f9b1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f89e8cb839f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f941a0fc92c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8729db522fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f96660113c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f88b52b22506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f8e1ac5e3620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5fa0912624b28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/52120800006.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/touhou_imperishable_night_story.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wavipotimavutulag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca3b007-69c5-4e29-9eb8-f18d6588ee12/fanipezulefetikapuwenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6107fa5-c77c-410a-ab1c-e2b1591c1ae3/baidu_browser_apkpure.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_off00006675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 5132 bytes
SHA-256: 2ad2a74dd489ed978c39aa0fc4b06ab207384cd6c99cb4523106dfbea5399cc7
font_01_sfnt_off000077d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 10588 bytes
SHA-256: 2968a95003f3cac0901676ec36dfc9353350409844383f91ae14f580a7a589dd