Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4069dd5a0e0730…

MALICIOUS

PDF

51.5 KB Created: 2020-11-01 22:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 92d3f7aef6c13d049df1199448a0aa5b SHA-1: bfa7ceb9ec3a7611f98ac35ba8cca5b7f98d4fdd SHA-256: 7e4069dd5a0e0730dce576038a5fc76f9ecd50cd35e90d61dd42c4ea79115c66
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, a technique commonly used to direct users to malicious websites or phishing pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL pointing to a known redirector, and 'PDF_SEO_LINK_FARM' indicates a mass of external links. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure users to external, potentially harmful, content.

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.com/123?keyword=fantasypros+rankings+ppr In PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/mofaxajufad-leren-fujunuxoguzel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f8cb7e866f4e.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/kusutonewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f894e961ecb6.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/1/0432/2800/4507/files/game_based_learning_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6716da23-5d4e-49f7-967f-30c447bfd7c5/94212874626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3930/7949/files/exponential_and_logistic_growth_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bc1f78-7cb6-4afc-bbad-7dbfd45e69a2/que_significa_chona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/6231/8015/files/neverwinter_testimony_of_the_brave_wizard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1305/3343/files/origami_printer_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1f51d2-132e-44d0-9e1f-25ca8568d55f/fazejaxabodakobepalugomuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32456b5-7bf6-49ea-9555-bc851e05b0e1/93262209791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9356/4833/files/fizowumizifiwikubugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/94049078660.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_off00008959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8959 5076 bytes
SHA-256: 65daf4fd99190605a9ef004be9f2804ff5993ab035693fb994170c2ce2d7b455
font_01_sfnt_off00009ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC2 11496 bytes
SHA-256: 665f9a3e3a4045e8d3366915bbb37a88b856a1db25b730f2aef79c5eda41d8c9

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