Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34437444b97ad80…

MALICIOUS

PDF

58.2 KB Created: 2020-11-01 17:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7dcb11d3b21bc7a84816bcafb9f61e84 SHA-1: 7ecd2d16747b028ea65267862c7a028151529838 SHA-256: d34437444b97ad803ca3b1c50de92351edd82a514d5613de1e3d75f91da1fd83
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/123?keyword=pimsleur+spanish+1+reading+booklet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8a42b760881.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8309259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8af2bf712a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5f9e58d97d65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f9076220014e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f9be49bf400d.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/1/0501/0305/8623/files/karomikot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9432/0310/files/lesson_3.4_practice_a_geometry_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7675/6664/files/35432689507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ed28f2-56ac-4b8f-ac22-7f661c40ca29/preparation_of_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/fishing_hook_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8900/9086/files/bushnell_tour_v2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3df08d-21b8-4b70-93fc-d65c22644c12/12594172946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3356/1768/files/latin_for_earth_dog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3140/4959/files/pefogalimumima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4002/8837/files/tisin.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8310 5712 bytes
SHA-256: 1dd71239b850f0b9b0d02e12d97988abbdbc3d040ef0ba1858f028f291970a4f
font_01_sfnt_off0000964d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00009edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDB 11164 bytes
SHA-256: da5086862f58509299c4f6947e95b7781fb520e352b31f97bfa32072e5c5770a
font_03_sfnt_off0000c516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC516 16352 bytes
SHA-256: 9cb0650af5bdb2e8593988a361a40fe1030b61ea25d8fce7fab67310e0b1f9a7

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