Malicious PDF — malware analysis report

Static analysis result for SHA-256 833e382e8ffe2738…

MALICIOUS

PDF

73.6 KB Created: 2020-10-28 07:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb4d7bc174bb56747618c3c452721929 SHA-1: 359df0d0d791597f26aeb19337fd8b4cb1583cd0 SHA-256: 833e382e8ffe2738df8d4c50851965352b867e803a9848992dfa7efb1b1d4948
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link directs to 'ttraff.cc', a known malicious domain. The file also exhibits characteristics of a PDF link farm, with numerous external PDF links, suggesting an attempt to distribute or redirect to other malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=le+morte+d%2527arthur+summary+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5f98f2f1d2673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8b97f9a8955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f8faaf81e491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f98c9548a85b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/career_assessment_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/paruxakosedu.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/kitarazojudiwotut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8755/3213/files/swivel_sweeper_max_replacement_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2612/8289/files/nisusovaxuragabetub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7368/2590/files/texanupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1140/7524/files/days_of_the_week_printables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/android_force_destroy_fragment.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/alternating_current_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/viwimujidalazufev.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/january_2019_to_august_2019_current_affairs_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e71ac6-912c-47e1-a193-6959202cf034/19036856831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e73459-020e-4cd8-a438-5d5825bed1b1/la_democracia_en_america_alexis_de_tocqueville_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811f10d1-73ee-489f-b4ee-8cc6ee3a080a/26781357085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fbdb71-6f52-46af-ad78-b7078d89edfe/52194891869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d7988f-96c1-4db8-8cc6-5095f4102814/35909462265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b341c648-f2ea-49c7-b68e-4f1df18ad6ef/likugamofufakiwuxun.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5328 bytes
SHA-256: 30461d90517dc4fbbc1e1b5ff7a66b142276620476e900f1098af9d8a9116245
font_01_sfnt_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 11016 bytes
SHA-256: d5dd685c89a3b2aa8af3d45e76ab681d883561c21f08018ca91fa313316a1c1c

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