Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89bdf8489d46d0e…

MALICIOUS

PDF

42.7 KB Created: 2020-10-31 02:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c6a013da62bff739f277d8a7075a7812 SHA-1: f3e641c82da7f83b2a673864a57895100f27840f SHA-256: f89bdf8489d46d0efdab31ac9aa3bdf829e88ca65d09c0a978e98b25a868e276
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=baldwin+520+organ+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8e9f7fab722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f92feb190c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8717911b1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f9c9b5a74928.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/wexukufedepim/ain_t_no_sunshine_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/embodied_cognition_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1703/3657/files/5112659999.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/tufinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0613/5961/files/football_quiz_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/i_want_candy_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/78196672952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5498/5127/files/jejogupora.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_off0000654e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 5508 bytes
SHA-256: 30f3b09fc47f2041fade7462e9868f2cdbfb55c0f484d6f5db6b3bb563371e49
font_01_sfnt_off00007805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 11392 bytes
SHA-256: c42c359e29383db262ea11898a1a3f56440fc9f047f1435e7e7f99a5fd7c48cb