Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd7e11293cd63e4…

MALICIOUS

PDF

48.0 KB Created: 2020-07-26 08:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24fb49d10b5e75ff10ac6ad28db99c48 SHA-1: bb445c69a9851e9fddb3c0dfedf601bacc7ebf2f SHA-256: 5cd7e11293cd63e45513d115deca42cec8e4723f826dd1c8ac7cd233a7c11c70
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, suggesting an attempt to distribute malicious content. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=free+bbq+invitation+templates+printable In PDF document text
    • http://files.azsmashersbaseballandsoftball.net/uploads/1/3/0/8/130874544/dulewakanoxu.pdfIn PDF document text
    • http://files.mrsehling.com/uploads/1/3/0/9/130969728/1638388.pdfIn PDF document text
    • http://files.gwworldwide.net/uploads/1/3/1/6/131606256/mutadadoralakepif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/59367253809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/17173553460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5883/9203/files/pemaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5393/8853/files/kevezimovoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/94065165182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/95861192913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9854/6082/files/9533486929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/21664835053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/jikuzaxal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/xajuvozomadatetigevegawuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/gazonijiwaluzosegavore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/91574843005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.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_off00007f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 5032 bytes
SHA-256: 6117fb294f199b5935e7e7c929aadd371f917617e17de60e8c53f01d1c7e1557
font_01_sfnt_off00009085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9085 9976 bytes
SHA-256: b0020d0f0d6fa6c55f6fc55c6aaae7fae892625bb33f3f709ca2aae2821c6301

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