Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe2a507a500eb3f…

MALICIOUS

PDF

42.4 KB Created: 2020-10-31 09:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: df541bfe758d8bfba2e2c055ed1578e9 SHA-1: ebd2b2526b01b876be24500b1647f9b578347591 SHA-256: 1fe2a507a500eb3f7fa6550b473e2a630fa6ccf201825e17acb1d3787603e7f4
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/123?keyword=sc300+for+sale+florida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f8ec2e179c9b.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/simarefafagiveb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47089df-ca6d-4480-9f41-8a02b9531aec/52505079973.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/open_set_recognition_machine_learning_python.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/navakoxejaguxi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/les_alphas_lecture.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/u46_district_records_office.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/single_entry_bookkeeping_system.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/liwubivobajodepa.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/faxafigavibubogupafa.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/c._v_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae38dfcc-cac3-462a-9a74-ecfe55d4d61e/lanujud.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_off000065b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 5424 bytes
SHA-256: 45bebbe8f29d39f1b557bb7884d9cadee921205a1e12c76c6a3abbf7c7ef07c5
font_01_sfnt_off00007833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 10828 bytes
SHA-256: 6b4ffd673203c15ed288ec6bc9bb28b0d54d01780247a03e61913a58e499b797

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