Malicious PDF — malware analysis report

Static analysis result for SHA-256 132b3ec68a5601ea…

MALICIOUS

PDF

39.6 KB Created: 2020-11-04 15:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f6a407055366cce2fba89fc64deb69f SHA-1: 97e1a2879625d478d5e7c73a55c4d6233c39e563 SHA-256: 132b3ec68a5601eac3a6459b04d7811984e01c6b7e46da2392602d89345a9bfc
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, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with SEO spam or phishing lures, suggesting the primary goal is to drive traffic to malicious or unwanted sites.

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://gettraff.ru/aws?keyword=orthopedic+shoes+for+men+nyc In PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/lewuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f8e97a984b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5f952e787efea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f88fbc67c122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fa276eabfa81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_5fa1a104bcbe0.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/bifibotov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8dfcecbc40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5fa2518eaf3fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f9b9d76874bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_5f99d76a0e8bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/tefulakajo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/famous_trumpet_players_alive.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC9 5068 bytes
SHA-256: bbde0f9f8578b4463ea2ce4c6fdac46a235c038edc900af91fe050486a60eaa5
font_01_sfnt_off000060e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 10132 bytes
SHA-256: b515565ca78239e3471765c6b616652dca45f209ab3d54eec118c3b8f84fefe6
font_02_sfnt_off000083a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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