Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2366006528173c…

MALICIOUS

PDF

40.7 KB Created: 2020-10-31 14:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 955d726e1ed518bea7fb59c82599d229 SHA-1: 8f5533e5b9660ac7b40418c74bdfb10026e6e088 SHA-256: 6d2366006528173c3a13f58330b3c0daa19e7d3700a4b9b29a8bee68baa86b94
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a harmful site.

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://ttraff.link/123?keyword=the+four+agreements+pdf+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f91c1ccecb8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f9b67fdb6a32.pdfIn PDF document text
    • https://lonodoxelu.weebly.com/uploads/1/3/4/3/134305804/livozimowigexit.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/1/0500/8844/4065/files/currency_in_panama_to_usd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b3aaed-88a1-4c64-b981-1f64784bd6e6/bts_love_yourself_answer_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098b2c07-e568-4e6b-b91d-e7ed9c7c41a5/67071662625.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/dafaruzugodamar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f095193-02a7-4b12-bc00-588de1c96854/78102640137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1286e069-3335-412d-b362-468e047efb10/dojukevexaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/hide_running_application_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdce4f45-b0ed-49f0-8721-e6dc761160c8/82440986071.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_off00006126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 5476 bytes
SHA-256: e2e76ae102ade4a39b636628607470e88ee58ef3f48fdf60fb5f398c411832fd
font_01_sfnt_off000073a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 10088 bytes
SHA-256: 09051a2d1fa30f70f25e86eeece51fb47f15386dd084164845ce75c6611077ec

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