Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d94fc4c2a070ed7…

MALICIOUS

PDF

50.5 KB Created: 2020-10-31 19:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f416b7b997d4deb4c66565c99f56dd01 SHA-1: 47cef18f5209c9b42f1c91985c3f19cee553c9ca SHA-256: 8d94fc4c2a070ed79c2127107df084baf2ea2f3cfae6bd5cd73d7c39404d2e43
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to distribute malicious content. One prominent link, 'https://cctraff.ru/aws?keyword=kitchenaid+black+friday+deals', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users into clicking it. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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://cctraff.ru/aws?keyword=kitchenaid+black+friday+deals In PDF document text
    • https://bujegeti.weebly.com/uploads/1/3/4/3/134355457/vuratukowawoxuda.pdfIn PDF document text
    • https://jixidaku.weebly.com/uploads/1/3/4/4/134495137/5613424.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/xanif-dunux-fasesuwopixon-sunaxamexore.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/1/0477/0503/0812/files/progressive_era_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9792/1975/files/brevet_anglais_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/fudekudinoxapuxufupatas.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/semogididu.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/carrion_crown_part_1.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/george_jr_high.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6562/0672/files/buposudepozonexo.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/kituzajibizifomedob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4447/3498/files/only_clothing_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7156/2438/files/56602931331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0837/4953/files/uti_pan_card_application_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0332/8673/files/beginning_rpg_maker_mv.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_off000083ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 5384 bytes
SHA-256: 313d3a87792eaf2bf97bc1a649332c0e517214055ae1a522fc3e9da0c387f961
font_01_sfnt_off00009620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9620 11436 bytes
SHA-256: 31bb09adfef60e954217c4e949434f5bec286f831b00193138ba1bdfe56d9f09

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