Malicious PDF — malware analysis report

Static analysis result for SHA-256 682c9a31282d00af…

MALICIOUS

PDF

36.7 KB Created: 2020-10-25 10:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: bd81c1432d8092f8078c1218b10fae3a SHA-1: 21300229a30b90d2a4f22ddd9046d07cbb2c17a2 SHA-256: 682c9a31282d00afcf854db2b62eff1c9094c986e2f6f8ff7977ed8d53059a48
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=animal+alphabet+worksheets+pdf In PDF document text
    • https://voganolov.weebly.com/uploads/1/3/4/3/134372868/dometozasosirig.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/d29befc80cb2e.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/pujazi.pdfIn PDF document text
    • https://wubabenababi.weebly.com/uploads/1/3/4/4/134432193/nuwaxetep-dafalozogegun.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/4e0ec8f6ec.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/punuwagevugupeb.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/mozakidubuz_weviderara.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/9534615.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/2e6f08e104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/28452284363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0156/3301/files/jesus_calling_devotional_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9252/1383/files/rolling_loud_nyc_tickets_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7147/9201/files/drugs_safe_in_pregnancy_and_lactation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2891/3560/files/microsoft_outlook_email_setup_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/30588249693.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/area_and_perimeter_of_rectangle_and_square_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/beamer_presentation_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/philadelphia_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/biblia_takatifu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/33508824398.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_off00005005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5005 5568 bytes
SHA-256: 6fdeaeeccc257de5b9ff5000c0d69685065c17fb1b8cdf115a97022f9deacae1
font_01_sfnt_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 10164 bytes
SHA-256: 5b4bfed718015693ae1813c80d406d194a8a9fc711dd23600aa05f6fa9abf8ec

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