Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2e0970e0163a3d…

MALICIOUS

PDF

37.9 KB Created: 2020-09-13 10:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e2c1f2ba8cdb940abe371638ff72a097 SHA-1: cd73f7af4b02a7afd8f1aae018e5690945aada20 SHA-256: 7e2e0970e0163a3d8cb780590623724356aff8db3beb4e04c3d1e4031c71190f
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.link/pify?keyword=houghton+mifflin+english+workbook+plus+grade+7+answer+key In PDF document text
    • http://files.cindysearles.com/uploads/1/3/0/7/130739076/b0e36db.pdfIn PDF document text
    • http://files.revolutionaryyou.com/uploads/1/3/1/6/131606295/65481a6ffeb.pdfIn PDF document text
    • http://files.vitaemovimento.com/uploads/1/3/0/7/130739269/jelubo.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/1/0431/4251/2797/files/72908099385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/pufopovufuxogasokude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/jituwudalosas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/metalocalypse_seson_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/damotekuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7246/2486/files/12364355980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/maths_formulas_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2877/4044/files/usb_bootable_linux_mint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/photodetector_applications.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d2751c_2550da54cfdc43e4b1c869edb73b7f37.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/868401_beb8be628eae43baaa2f206c4f454236.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c75f60_e12a007b07af43b28b2b1ce428859e09.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_off000052e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E0 5892 bytes
SHA-256: 404a59252ffb03e4ac2e950ced089b027b28af233a85b06dbc19ae24235852fa
font_01_sfnt_off000066e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E1 10448 bytes
SHA-256: 3678e9abfd18ef90cc28db95377da6fa05de7b23bc2b284202251d041f592a64

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