Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ba3f271d142e27…

MALICIOUS

PDF

44.6 KB Created: 2020-10-29 23:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b20478257748be6169266b07dcfe4fc9 SHA-1: dea84cc10e20c14ee365b967f0274d7a4b29facc SHA-256: d6ba3f271d142e275a62b452bb487f51008137dcf13d52e86b51fc787250aa82
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.cc/123?keyword=inside+madeleine+pdf In PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/713428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f926fe370fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8e764e2241f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f97920c49c64.pdfIn PDF document text
    • https://vegiranelikir.weebly.com/uploads/1/3/4/3/134399044/weden_wemepupawamiki_vibixe_wovoterurov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8b12ce33a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f94ef8a0492a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f87c75c88b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87b1303174c.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/nonabafat/xipidimosusem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8888/0821/files/9_25_as_a_fraction.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_off000071d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5028 bytes
SHA-256: 809bc4a35bf121eb42049ada6951880c4e3d2604d5f20e7eab0cec14586daa96
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 10228 bytes
SHA-256: 9e44f35b167b3dd5ae2db1e2e3ec8227b6630e58b9af0c9d2564a797afbe5808