Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb54426851a631d…

MALICIOUS

PDF

40.2 KB Created: 2020-10-07 12:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e001974cc50f3ee0d8fd86210f9fea09 SHA-1: 720e4e96bee7d5432a0671d76a2d49b743eb18a5 SHA-256: beb54426851a631ddac2ba5ef2de1bec0125f56f2d18f1f7a6f0a5f1cadca252
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector and a PDF link farm. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute additional malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/pify?keyword=mademoiselle+noir+spotify In PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/35089553127.pdfIn PDF document text
    • https://site-1039676.mozfiles.com/files/1039676/papujipasewa.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/61962451012.pdfIn PDF document text
    • http://totupope.prog-edge.com/uploads/1/3/2/6/132682006/kutikefulomubudukoma.pdfIn PDF document text
    • http://pusoxinot.triokhnopff.com/uploads/1/3/0/7/130776007/914d5dc25e.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/1/0430/6731/0231/files/ms_haake_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1197/6611/files/hulk_wallpaper_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8481/0907/files/26477639908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9636/2139/files/powodobidujizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a1a850-df3b-4342-8456-f8ca88a5cfa1/setekuwobuwepeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca88d47-c756-4c2b-80e8-8c9b58f1d2e8/15088950178.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_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5292 bytes
SHA-256: c6ff5847dd2a227063690920d58ea930cdf8fda09d2cf485950c9a1346fd36db
font_01_sfnt_off000071c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C0 10036 bytes
SHA-256: d7b18bf87a7da511f82f7e7edd1af207c5e5c7eebdf36442bf8e66a5d53f04bb

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