Malicious PDF — malware analysis report

Static analysis result for SHA-256 08980a1b9fb7ddc4…

MALICIOUS

PDF

35.7 KB Created: 2020-10-12 06:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 83786673117aef093ee7bfdeaee2a113 SHA-1: 23c2b01dfc08859a9dec5fa4284b70a83b2328f4 SHA-256: 08980a1b9fb7ddc48554ae025f8ec77b6538ab12334921512fec24a415a9d5d0
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.cc/pify?keyword=4+syllable+words+in+spanish In PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/vivibixakuvajako.pdfIn PDF document text
    • http://mugafixa.iesagency.com/uploads/1/3/0/7/130776247/5392449.pdfIn PDF document text
    • http://vebubozux.adamcarpentry.com/uploads/1/3/1/1/131164312/3976551.pdfIn PDF document text
    • http://files.unconditionallovefoundation.org/uploads/1/3/1/3/131380343/d4740fb340fe.pdfIn PDF document text
    • http://tijiraxo.positivelyobedientcanines.com/uploads/1/3/0/8/130814328/tazidewadinaxu_nesojiruvab_tibomux_nopopilopak.pdfIn PDF document text
    • http://files.johnsonmediationservices.com/uploads/1/3/1/6/131636779/zagulusezan-tikuluruberowo-gigagupo.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/1/0435/2960/1175/files/muren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/pesunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/fijomupit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/the_war_of_art_kindle.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_off000045c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45C3 5376 bytes
SHA-256: 8fc98d442650a765529ea84db9a19de62d04198837c6dd1e6f93d828fe59101f
font_01_sfnt_off0000580b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 13232 bytes
SHA-256: 2e070771cf7e3afdf1fabc9b96120cb3e557bf8b0a41e7ea37b567984f9559a7