Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b2b026d7f0396b…

MALICIOUS

PDF

58.7 KB Created: 2020-10-07 22:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 20454a69072b7e3a8dd77eaecf81e036 SHA-1: baab70b608a8c0afa0544e71ac5049ae5a1e9422 SHA-256: a8b2b026d7f0396badaac031a05f4529bdebab993494e6d16096a4555714ea78
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Travel-support phone-number stuffing scam high SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://gettraff.ru/strik?keyword=enderal+console+commands In PDF document text
    • http://files.keswicklabradors.com/uploads/1/3/1/4/131408415/87d93.pdfIn PDF document text
    • http://files.msurunningclub.org/uploads/1/3/0/8/130815381/7520972.pdfIn PDF document text
    • http://files.relaxmassagetherapyclinic.com/uploads/1/3/1/4/131437322/237616.pdfIn PDF document text
    • http://files.fathersweek.com/uploads/1/3/0/7/130740374/4808561.pdfIn PDF document text
    • http://fekes.gastroenterologist.london/uploads/1/3/0/9/130969465/82970.pdfIn PDF document text
    • http://wutup.brucesbreads.com/uploads/1/3/1/4/131408864/52b9e686433c5.pdfIn PDF document text
    • http://files.porvoontriennaali.fi/uploads/1/3/2/7/132740182/2963b9078b.pdfIn PDF document text
    • http://sonupete.adelaidedanceparlour.com/uploads/1/3/2/6/132696030/4089161.pdfIn PDF document text
    • http://files.emmaegaia.store/uploads/1/3/1/3/131379246/2291448.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a940.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a940.bin)
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/chesapeake_and_new_england_colonies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/filosofia_y_poesia_diferencia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5485/3027/files/equivalencia_de_5_gramos_a_mililitros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3238/2110/files/how_to_fill_a_zippo_with_butane_gas.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_off0000a940.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA940 5040 bytes
SHA-256: 5f02a50541ada31237ab41d3d516c425b2243c5f23ecc0ddd988ff30b7e71255
font_01_sfnt_off0000ba4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4D 10552 bytes
SHA-256: 913b65d61026af347183c159ba9f2b810d37f2c4f52255c5ed3e8ee6bd547e22