Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfe82726deed5fd…

MALICIOUS

PDF

58.8 KB Created: 2020-11-06 19:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 12867e62e3a72c01e3855874f1be5a63 SHA-1: 119489d81b627024d41e5a4eb2c8c095cde3dbab SHA-256: 1dfe82726deed5fd76e5e51e44a6ff3bd72baed286c69cd521581c353999bea9
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 of which point to external resources, a pattern indicative of a link farm or a phishing lure. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/aws?keyword=unblocked+games+for+schools+66'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious 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://gettraff.ru/aws?keyword=unblocked+games+for+schools+66 In PDF document text
    • https://jipemovikeral.weebly.com/uploads/1/3/4/0/134012889/vemobopiniditimuj.pdfIn PDF document text
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/9928294.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/lanidufo_divop.pdfIn PDF document text
    • https://vizipelijokefar.weebly.com/uploads/1/3/4/5/134512389/7332917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5f9d4e88d35f4.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/0324cf738960be0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/timex_sports_1440_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/bemovunugatavobod.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/mufunedifosisavola.pdfIn PDF document text
    • https://dumigezeb.files.wordpress.com/2020/11/76136253159.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/minecraft_command_science_potion_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/20591679602.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/gipapazenusorapavilanib.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/tube_digestif_cours.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_off00009f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F41 5784 bytes
SHA-256: d1f64d83ed895f4e447e70e10113d1c9ea5267dd0551289a43057580af8d4b6e
font_01_sfnt_off0000b2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CA 17080 bytes
SHA-256: c7a7661ffe67af1d47476ccd9ad23bc346922d1e32f1f4ff3b89bb1853399709

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