Malicious PDF — malware analysis report

Static analysis result for SHA-256 889c8a0917b8b3c6…

MALICIOUS

PDF

43.2 KB Created: 2020-10-29 01:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c78795552edd3a6d29395eb2fe222e0e SHA-1: 51438b8e6f060815b5cc9b20cf7d521209e95a14 SHA-256: 889c8a0917b8b3c6193ca71edb35f08fe71056fe453d4179bc1209eb02c9fe80
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=flower+girl+baskets+diy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f985c46dd014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f99f74392d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_5f96e1da4cef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9250ae9dba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8db808b21da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_5f93d85341b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f91d3e320cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f99c38c1c1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f9792c71f74b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006815.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006815.bin)
    • https://s3.amazonaws.com/megulu/30207173015.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/87386736271.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/lajanojibolew.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/80396022748.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/ielts_speaking_tests_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/sewiladubaduzazaputo.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/mision_de_sena.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 extracted file (font_00_sfnt_off00006815.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5348 bytes
SHA-256: 7afe8c5252e4660486f074862ad8b93d417c95c40b3e196fb308f9c9a884707e
font_01_sfnt_off00007a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6D 10924 bytes
SHA-256: 161be1aeb9668ca05f342a007975cc0de93d2f8da0ca6949dc8d774bb87f0481