Malicious PDF — malware analysis report

Static analysis result for SHA-256 949919604066ff61…

MALICIOUS

PDF

43.7 KB Created: 2020-10-12 08:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a7aac7cd4e69a69d1bdb5ddea42f6a94 SHA-1: eead1e89fe1b4e79951e63d554a86adb16711dc5 SHA-256: 949919604066ff6150643802403dd1799ff2a4ecc6335b3203e981793734cb6a
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.club/pify?keyword=short+story+elements+worksheets+pdf In PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/pexavasosidosavalukizole.pdfIn PDF document text
    • https://site-1040177.mozfiles.com/files/1040177/jonabowovufigekere.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/sivefugapufadixupov.pdfIn PDF document text
    • http://files.sthlmtapas.se/uploads/1/3/0/7/130775545/8d94d2fd3ff01c.pdfIn PDF document text
    • http://files.izvents.com/uploads/1/3/1/3/131398378/2747676.pdfIn PDF document text
    • http://mofoj.customer1stelectrics.com/uploads/1/3/1/6/131606289/taredubemabapo.pdfIn PDF document text
    • http://files.asrcleaningcompany.com/uploads/1/3/2/6/132681192/navafanonovenukidig.pdfIn PDF document text
    • http://lififinix.maplelanepavilion.com/uploads/1/3/2/7/132741073/mixopanafakax.pdfIn PDF document text
    • http://files.lasvegascharactervisits.com/uploads/1/3/1/6/131607075/levaxikolixana-reveguvezeleweb-wujiso.pdfIn PDF document text
    • http://dotixun.flaminglotuscreations.com/uploads/1/3/1/4/131406412/b86b6b.pdfIn PDF document text
    • http://files.thisismarciecolleen.com/uploads/1/3/0/7/130775205/dulefaw.pdfIn PDF document text
    • http://dijaj.alexandrakwilson.co.uk/uploads/1/3/0/7/130775583/9739368.pdfIn PDF document text
    • http://gubur.yourselfservices.com/uploads/1/3/1/4/131438729/a433507.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/1/0432/1086/6851/files/end_of_school_year_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3507/3943/files/funniest_toilet_paper_holder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0953/9747/files/wufebuzezuzejufilefokat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9161/4614/files/47371976004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6027/8949/files/xunodo.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_off00006cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 5432 bytes
SHA-256: 7ace1a2cfc98535fcac42d1c3f588a492f98e257b2f00718c8fcc7b517e02df4
font_01_sfnt_off00007f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 10000 bytes
SHA-256: dee3e22124f579d956057421aa8bb875f54912a065c7d7b2cca35f0eb6a5884d

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