Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed7b3591b8eb20a…

MALICIOUS

PDF

41.8 KB Created: 2020-10-08 23:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5704d68f8286a8a1e9b798c0691c5c70 SHA-1: d04397f1931441ee9a463ff29998699dd9a252f3 SHA-256: 5ed7b3591b8eb20a379350bd6fd974f074c4f9d23f50683854b76dcd38abfe86
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 pointing to external resources, which is indicative of a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document is designed to lead users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=realm+of+gods In PDF document text
    • http://files.georgetownpiano.com/uploads/1/3/1/3/131398379/619131.pdfIn PDF document text
    • http://files.miamfoundation.com/uploads/1/3/2/7/132740619/0cf6ace4.pdfIn PDF document text
    • http://paputiw.alexroweillustration.com/uploads/1/3/0/7/130739893/tovowuxiwalul-vekuva-latexetejuk-redipido.pdfIn PDF document text
    • http://files.rarobubs.com/uploads/1/3/1/8/131858156/zemojob.pdfIn PDF document text
    • http://files.otherworldlyart.com/uploads/1/3/0/7/130738928/1747678.pdfIn PDF document text
    • http://files.luckytransformationcenter.com/uploads/1/3/1/6/131637255/jodowexuletezidex.pdfIn PDF document text
    • http://files.champdaction.info/uploads/1/3/0/8/130813855/913a41900fb70.pdfIn PDF document text
    • http://files.artvisionmonde.com/uploads/1/3/2/7/132741475/98697b4edfab.pdfIn PDF document text
    • http://files.winchesterroadanimalhospital.com/uploads/1/3/1/4/131454034/pebenanon.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/1/0482/9265/9362/files/72284708585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/xefagidanazorojibaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/35191279089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/why_is_appearance_important_in_public_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2624/files/61152298884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3115/4847/files/72304272311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/extra_lives_why_video_games_matter_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6340/0861/files/midazujuxetadiposu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0963/2150/files/fairy_tail_elfman_sister.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_off00006782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 5136 bytes
SHA-256: 3af3817b3702e2342823802db6b47fc038628f78d9da398d89d55be01e867360
font_01_sfnt_off000078f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 9868 bytes
SHA-256: 7cb78bcc59274ef2080c82038e5429fa0c9737a522a65b8a26adb1787afe3872

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