Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5f5026d597bcb9…

MALICIOUS

PDF

40.0 KB Created: 2020-09-20 00:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6b4971a9e92cde2a0128e4642d3757 SHA-1: 0e17f9a0c413c474d18bcaa106a050f509922f92 SHA-256: 0d5f5026d597bcb90ab79502edea0f7517232bc31b9727642c552ec3bf9f276c
154 Risk Score

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 suspicious domains and are flagged as part of a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically a URL related to 'cookie clicker hacked'. The document body, though heavily obfuscated, also contains references to these lures and URLs, suggesting an attempt to drive traffic to malicious 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://ttraff.link/wix?keyword=cookie+clicker+hacked+unblocked+weebly
    • http://zazurot.southedmontonchurchofchrist.com/uploads/1/3/1/8/131856819/kisog-keneweb.pdf
    • http://labakiluj.f5innovationsymposium.com/uploads/1/3/1/0/131069839/jeluz.pdf
    • http://bivijile.msmorales-chemistry411.com/uploads/1/3/1/1/131163729/5008513.pdf
    • http://files.maccastoart.com/uploads/1/3/1/3/131379039/b8983f2.pdf
    • http://files.benabrahamson.com/uploads/1/3/0/9/130970001/rerapefunedola.pdf
    • http://perupigaj.goodcompany.works/uploads/1/3/1/3/131380160/tebeduwetutamu.pdf
    • http://files.theartofjennifermcintosh.com/uploads/1/3/0/7/130776200/wumisixukuko-vajis-jowadowo-nuzonifedanutos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://310ebd48-c6c2-4ba4-8f95-28fe61909a58.filesusr.com/ugd/dd6616_d6bae2e776344bafb6edd047bf213331.pdf?index=true
    • https://5aeac327-26e7-4fc1-8016-9e9315a165b7.filesusr.com/ugd/5befcb_82340d750e3646f1a7bafd805e2aa7a9.pdf?index=true
    • https://d99c409e-c396-4093-a9d2-78a46212963f.filesusr.com/ugd/e5d5e5_2be6054260ab4021911f2af17412f687.pdf?index=true
    • https://5cb59de6-1a5a-4b8c-a676-4e27f7760891.filesusr.com/ugd/c8d394_03f39046d6fb42de9ecb15672dc10e71.pdf?index=true
    • https://a9ed0c79-0e42-4066-8188-15c174a846c0.filesusr.com/ugd/c0518c_5f93463f8d0c459892402e21f75d293c.pdf?index=true
    • https://7593e6fb-a1cf-4499-9865-9e25952974ce.filesusr.com/ugd/c63bf9_1fd73344cb3346b68fad309f1c9093ca.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ead.bin
1a284981f1ec9ce20a41674c32b9424801a2247300202242195079684573c60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 5152 bytes
font_01_sfnt_off00007042.bin
836686e767aa8773007dad28d179c2d5d547c9b49d5ca95f1f2f98ac23f6163f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 10252 bytes

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