Malicious PDF — malware analysis report

Static analysis result for SHA-256 b180a84860b5d934…

MALICIOUS

PDF

44.1 KB Created: 2020-10-25 19:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8569bcc627dc05e1aad4a6ed30405e39 SHA-1: 24dbfc5d274bfbd25b42a61522d73dcdd4b169cb SHA-256: b180a84860b5d9344e196d5ca63ca1a051df9dd357c0ef1770a8ecb0c1be2575
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.com/123?keyword=manual+do+mundo+experiencia+ovo+na+garrafa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8a78235c0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f88644f1a979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f954fa221f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f9182e1db6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f8b5188958d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5f8f1561b0cf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c03.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c03.bin)
    • https://s3.amazonaws.com/tiluwisulepam/insurance_awareness_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/flow_transmitter_calibration_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/26916982747.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/peririmeroxaxob.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/70606929779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff9e5ea-3723-4f8e-8161-e3f6b9a0506d/nidaxenas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c554e76f-1571-4ba4-93ed-28a7a2fa08b3/35889224667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41921007-5dcf-4376-8f8c-236bab703bb8/suruxeruboxowelufevadigid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a7e259-c194-4c50-b9e5-41a3866eebc4/formulario_de_un_club_deportivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ca4f43-a0c4-475c-b67e-0755003caeca/wish_me_well_3_yfn_lucci.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c6d681-25a8-46a7-abf3-c30f23592822/mezajorapizevure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b378c2fc-9c21-4bf5-81ff-27c58406e3a3/72682327611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9353/3886/files/76349872124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7084/3797/files/mabavepajebutumigeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9433/9481/files/vepam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3647/2992/files/zello_z_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0878/9150/files/mesisiradetex.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_off00006c03.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C03 5428 bytes
SHA-256: 54d9734bf1fcf5b5b35289c74e760908ef6a59f85660a8468997a8a4969f118a
font_01_sfnt_off00007e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 10852 bytes
SHA-256: 18efd032cf02abfb560496b9c80af129e9d8aea4cb8eb2f68ba5a805ecec08b8