Malicious PDF — malware analysis report

Static analysis result for SHA-256 edccd7e054de90ba…

MALICIOUS

PDF

33.6 KB Created: 2020-11-03 04:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 861db0226782d5ce1576a8d3e96f0d6e SHA-1: bd6a68879eb2bd2fae6eec195cf11ad27b30079b SHA-256: edccd7e054de90ba18b37d189e70966f62dc1eb4c3ec9bb429bd3bbe33b6a9f7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=clark+creative+education+whodunnit+answer+key'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://s3.amazonaws.com/nabifovu/sd_governor_age.pdf'. These elements suggest the document is designed to redirect users to malicious infrastructure, likely as part of a phishing or spam campaign.

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.me/123?keyword=clark+creative+education+whodunnit+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5f96cfa36f61e.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/nabifovu/sd_governor_age.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/dugibewepovodazokejep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5333/files/md.emu_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/mp3_converter_apk_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/positively_present_guide_to_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2609/8594/files/rafajibebakat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5270/1125/files/calvary_missionary_baptist_church_dayton_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/area_of_a_non_right_triangle_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/problems_of_inter_ethnic_relations_in_nigeria.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_off000042f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42F9 5252 bytes
SHA-256: 7da2dcb47426a34eeda84096791116696c3b412e507e1e3455263a18aaee4a94
font_01_sfnt_off000054e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E4 10752 bytes
SHA-256: 08a5fd973a7fc51aa8e29fc4888be48868ed398f252ba8aebca591178156af5b

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