Malicious PDF — malware analysis report

Static analysis result for SHA-256 463898a79e1fd725…

MALICIOUS

PDF

43.9 KB Created: 2020-10-26 20:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dbb1413a210150554e604c70a1cb1ce2 SHA-1: 86a78292c225561e2c9db5d1e62761220f4b71a2 SHA-256: 463898a79e1fd72510a2a9f5d5a50f4d068889bee2b91ba674caf3475558cf89
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/123?keyword=was+there+a+tusken+raider+jedi'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites, likely as part of a phishing 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.cc/123?keyword=was+there+a+tusken+raider+jedi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5f9490f31661e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5f96003011cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f88a730b14d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f87e917727f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8a47ca99cf3.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/regufojalojaza/77110987706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9222/3151/files/ragnarok_online_m_pet_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/43650318803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5654/3944/files/66215018452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2899/1130/files/55235308521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/dewelabojigetopugibexeb.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/zoxirilu.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/skripsi_akuntansi_perbankan_syariah.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/64422347464.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/tuvakumel.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/64761014425.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/epistaxis_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/black_belt_memory.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/biogeographical_region_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/20682269150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/triangular_pyramid_volume_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/jiluwilarikawijad.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_off00006c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 5032 bytes
SHA-256: 473bde43143c4a76adedc630780ddc3844a753074d1cab9a09528dfa89ab7dda
font_01_sfnt_off00007d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 11116 bytes
SHA-256: ed555a0c1bd183a2eedf5ba8c7f1b849241e39eee49a3b9fc0679e1898eeb1da

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