Malicious PDF — malware analysis report

Static analysis result for SHA-256 f762fad0eea958ca…

MALICIOUS

PDF

41.8 KB Created: 2020-09-06 10:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0f1c92037b184b3a10f2d02c7baf04f6 SHA-1: 349eaa569268ff886a432cf38958dab4566c52f7 SHA-256: f762fad0eea958ca5981e9f35a25df08e60c3bf060e76cd365979707a6819915
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/wix?keyword=bus+timetable+guided+busway In 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/857e61_2b053fdd7dd14ee896c0ea012a764b0e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2acec33f7acb4f4499c67516a0ffd7c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ade4e6_dd21c0ce922b4568b11e15eba5f9e5c6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9ef1ea_3ad4c2d0569d46d0914acbc957184bff.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1a791_5f3f33be409f4ea4814960d8d6bd34e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b5dd9_91faa0c9d0d4448eae0a0d8de8afbe43.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f7357_707a06beef7f491ea465bb6332aa7aea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/113e89_23ff8fc8db9646e2b8c1098cc44690ab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5bb01c_5552a5c83a0a480f880a2a124f32e079.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/455f95_79e263c1d7a44ea8be78ae27fd3ed9fb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/18574e_516209d0bbcd4e8d825abc36d02cee89.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f233452c5c7f4ad3997400f5b8f625a5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a43ec6_7f59481f87e84d00afba24aafb0603dc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/fafejiremagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/45570031417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/94798281778.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_off000064c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 5432 bytes
SHA-256: a28138303e5bed58f62e0c11c8bb6d8395072570fca3aaf6916074942250aa0a
font_01_sfnt_off00007746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 10348 bytes
SHA-256: 58d0dff0eaba00e0407a71546a5c130a33519f12a9e8b2d3e9d98a3267ae5e0a

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