Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4614bf0daf31897…

MALICIOUS

PDF

47.8 KB Created: 2020-11-04 16:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: f8b101ae5c55c48be5953a3c87c29412 SHA-1: e561ed590b67928aaabf6d703a2f7c72e8ea442e SHA-256: b4614bf0daf31897010f7f005073b2446abe19d4474f6d271345d5ea6c65484f
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.me/123?keyword=deciduous+forest+animals+names In PDF document text
    • https://zipiluzus.weebly.com/uploads/1/3/4/2/134234939/kaxiwa.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/niguzuroneb_xawux_jotonag_vanup.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/solajevawa.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/pexep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e3a83ae4-a5fa-4d9b-aefb-c39b2c7ae08f/divinity_original_sin_2_divine_ascension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809d98b7-b3ce-4e80-bd08-3992aed10e0b/wafojijafuzosarofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5af51a-1e1e-4741-9eb7-8efc51a60fee/the_whisper_emma_clayton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd40518d-4e37-4378-a532-5b28895fb8b2/8338339469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f86364-6d27-445f-b675-bc8fb1ac08af/xumivetolera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/kozabavixuvafebuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa4c76b-dbc6-46cd-80f0-1a444638f389/les_bases_de_l_anglais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/3874/0923/files/66760607431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905f135d-b73f-405e-9a0f-c6c8ef3a23ef/67986259974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495c0f10-f8ee-4ceb-81d1-d397f7ba22f3/firusidenadafelek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4881c10a-c0d2-4ea6-a906-ef116004130a/20518354026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 5048 bytes
SHA-256: eb69dedc0da51421484626a1713f95636bf3c2ef587384e80f236a37ac20a127
font_01_sfnt_off00007e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E08 11676 bytes
SHA-256: 1ba31ac7f90d8bc9778a3cd741e7afb69eefbe2afdd395f3fdca1ad71d148290
font_02_sfnt_off0000a44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA44E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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