Malicious PDF — malware analysis report

Static analysis result for SHA-256 da393064cc98f0fb…

MALICIOUS

PDF

35.1 KB Created: 2020-09-14 12:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07cdf46904fd4aadea3a587804a03b48 SHA-1: 74c776b4fac08ce6d12a7885130be118675a0502 SHA-256: da393064cc98f0fb78fd94b9dded7a1d4e50d39b0cf2799359bee5aabf36732a
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.me/pify?keyword=rock+falls+library In PDF document text
    • http://pubenuv.51eastshops.com/uploads/1/3/1/6/131606552/gulaxupuba.pdfIn PDF document text
    • http://nofufi.astiquesalon.com/uploads/1/3/1/1/131164250/8772431.pdfIn PDF document text
    • http://files.melrosespeech.com/uploads/1/3/0/8/130813922/5329929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/36f25b_5f007885f5a3455092d3796306579f57.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fa32a6_64ada1809b664009abca549c5190f452.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd9558_8ed1f0cef76e4aafb92ab074b4581a53.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07ef24_31662928e1204c5dad2d79d8b2577e7f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/92378770325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0667/9464/files/application_format_for_noc_of_passport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/relay_srd-05vdc-sl-c_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/37133402673.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_off00004b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B42 5188 bytes
SHA-256: b7ef700b1df48dc8afc987de3a5bf5cd4ddc2056163c95245917e7935482b311
font_01_sfnt_off00005d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 10308 bytes
SHA-256: 28dbca646f38aa7faa44d05e56aed29a997b57a8879fe6a71d94a283650fb9bc