Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad2427285432b82…

MALICIOUS

PDF

45.6 KB Created: 2020-10-10 01:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c6a74e9cf19120e1baeff8deb2b7b2b9 SHA-1: e83fc84bd1312de03c83fdae2d1b293973f3991e SHA-256: dad2427285432b82792bced260f28a7442e45587108f1c1ed79d5119bbad24ec
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://gettraff.ru/strik?keyword=dipole+moment+of+water+and+hf In PDF document text
    • http://files.arrowleisure.co.uk/uploads/1/3/1/1/131164519/8483863.pdfIn PDF document text
    • http://gunavux.jenroweaicp.com/uploads/1/3/2/7/132741100/bapimoj-didivopefum-sapiduraju-wiwejakidexof.pdfIn PDF document text
    • http://tiguluju.nextbillionventures.com/uploads/1/3/1/3/131384609/4740784.pdfIn PDF document text
    • http://pokavo.mrjjonesphysics.com/uploads/1/3/2/6/132681337/9756963.pdfIn PDF document text
    • http://tevidevub.americanfabrications.com/uploads/1/3/2/8/132816202/jazat_desitikukogowem_sakokugosifid_bibubasoxave.pdfIn PDF document text
    • http://files.puppiesfromabove.com/uploads/1/3/1/0/131070719/9397c002bfd7.pdfIn PDF document text
    • http://files.widowsfarmenterprises.com/uploads/1/3/1/8/131871494/wusewota_tuwiziru_letifixajered.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/1/0432/8679/0304/files/rutgers_summer_session_add_drop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7661/5837/files/motorcycle_labor_rate_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/panibamefonako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0992/3481/files/medewanagafeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/regujekopedusizinapap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/ravus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/42048696010.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_off000073ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 5192 bytes
SHA-256: e91da3fb40ec8627a1211509c3bd7eaabdf4ceaee30c96502e414278a739c315
font_01_sfnt_off0000857f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 10560 bytes
SHA-256: 347722decce19dd563eaac64771abed2a6b1d7c03e4de1b388c6275a7645f661

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