Malicious PDF — malware analysis report

Static analysis result for SHA-256 99205eee15200149…

MALICIOUS

PDF

33.2 KB Created: 2020-10-02 18:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9d50f7c1bd92388e2c9a0497d9f57ba6 SHA-1: e39a4ed572df29c9afb3c790f625098e77b508b6 SHA-256: 99205eee15200149924f5216b1932be985dd56a8e8b026ba1431cd1ff657edff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic point towards a malicious intent to redirect users or manipulate search engine results.

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/strik?keyword=heal+your+whole+body+pdf In PDF document text
    • http://files.cveducators.org/uploads/1/3/0/7/130775145/rotevogumotujow_bibazuzeju.pdfIn PDF document text
    • http://files.tbicoach.com/uploads/1/3/2/6/132681359/2872055.pdfIn PDF document text
    • http://palumo.menashastrong.com/uploads/1/3/2/7/132741031/bewekimomo-butofivagij-sabexe-zodalad.pdfIn PDF document text
    • http://files.zamdevelopsj.org/uploads/1/3/1/1/131164534/7449164.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/dujelubojo.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/1/0500/1995/8944/files/80706547597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0197/4431/files/31179745023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed0eae0-1a86-4499-a284-6751d43fe5b7/85260128341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0564840-ae8d-4569-aa56-f4a3a28473fc/85076899247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2900f210-90c1-49c7-aeca-e60f3ee3d17f/juxitosurewepenedirefoj.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_off00004659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4659 5248 bytes
SHA-256: 8eb487461ea458e9c31ee4f9e54e9a26efe153cd1c49b32189e2949dd54f7acb
font_01_sfnt_off00005839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 9480 bytes
SHA-256: 1025a3a76283b65045c8ffd707210d04ea2c36abbd2a2c9b3a0618c725b4219f

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