Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ecc4ca4b89705a…

MALICIOUS

PDF

46.4 KB Created: 2020-10-07 10:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cdc378f16350f1ac20aec95530b1d4f8 SHA-1: 7eb2dc618b6613e7e77431f51c2b8bd44d94b56a SHA-256: 24ecc4ca4b89705ac55d0f8e74acdd2f5837ac7dbf10c5e475d3f41f017201fd
184 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 disposable hosting, and one specifically to a known malicious redirector. This indicates a likely attempt to distribute malicious content or engage in SEO manipulation for phishing purposes. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a high-risk document.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=safe+church+policy+ucc In PDF document text
    • https://site-1039950.mozfiles.com/files/1039950/dewilofodafawidesizaxobeb.pdfIn PDF document text
    • https://site-1040259.mozfiles.com/files/1040259/xebuvufinoramakunalagewi.pdfIn PDF document text
    • https://site-1042444.mozfiles.com/files/1042444/luzele.pdfIn PDF document text
    • https://site-1043933.mozfiles.com/files/1043933/13902679138.pdfIn PDF document text
    • http://goben.marymadbaldo.com/uploads/1/3/0/7/130775288/pugova-pisomava-pebevu-divowo.pdfIn PDF document text
    • http://zorupob.endhomelessnessla.org/uploads/1/3/1/4/131453177/3912876.pdfIn PDF document text
    • http://files.amenabandukwala.com/uploads/1/3/0/7/130776790/5f424.pdfIn PDF document text
    • http://files.auto-scale.com/uploads/1/3/0/9/130969097/4873173.pdfIn PDF document text
    • http://files.kittyskittles.com/uploads/1/3/1/3/131383242/ximawi-ranuxaw-zikum-gabilipijaru.pdfIn PDF document text
    • https://site-1036839.mozfiles.com/files/1036839/84750171905.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/xorazubifezafezajok.pdfIn PDF document text
    • https://site-1041289.mozfiles.com/files/1041289/13843404088.pdfIn PDF document text
    • https://site-1044057.mozfiles.com/files/1044057/moruwerati.pdfIn PDF document text
    • https://site-1038367.mozfiles.com/files/1038367/41914821696.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/6118210917.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/65122115245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 4824 bytes
SHA-256: 2a50a770f02e962aeb412e3b905187c434e31d145a8ec9bf524297cdb357863b
font_01_sfnt_off00007c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 10104 bytes
SHA-256: 1d824a35e1495d77fc57831b491d8e1a4b7e093716c600204f8294a5a41059a4
font_02_sfnt_off00009f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F04 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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