Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ece95e5017406b…

MALICIOUS

PDF

44.2 KB Created: 2020-11-01 11:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f11872530eca7a1ec8f160ea93dd9f62 SHA-1: 89579770b6101e3f47c52af1618130d9632d1d70 SHA-256: 65ece95e5017406bbd015bb52e7c59de72ca40d7ee48b0b6c8c832348e2b4bdb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and SEO link farms. The primary malicious URL identified is https://ttraff.club/123?keyword=sportcraft+owners+manuals+online, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains similar URLs, suggesting a phishing or scam attempt.

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.club/123?keyword=sportcraft+owners+manuals+online In PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/95dc3.pdfIn PDF document text
    • https://rowegodidevonu.weebly.com/uploads/1/3/4/4/134468430/2109013.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/5faa16aa-2836-464e-ba03-ad0dc43d818e/punolikoranipagarulini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9581fb39-7c6d-4cf8-a814-ae4d9b07bc8f/rasinimobufujud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3019/9495/files/gfx_tool_pro_apk_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5577/0517/files/nejizikuzekadaneko.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/anatomy_and_physiology_for_nurses_at_a_glance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3505/6030/files/cannot_encrypt_sd_card_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/nemadimop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9005/7647/files/format_code_android_studio_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/37596213362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdbb475-7d0f-49aa-9b26-8178def7df85/cell_membrane_transport_systems_worksheet_answers.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_off00006dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5356 bytes
SHA-256: 934989468ce533e8a1fe7e174630177d46d95a8f0d3626eefa99f7bdcf7679b7
font_01_sfnt_off00008004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10636 bytes
SHA-256: d45937188afd08ec4bb00e0dcd33029d67c709f8b7495781822d1c286e31bbc9

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