Malicious PDF — malware analysis report

Static analysis result for SHA-256 182d6b9fff2ae2f9…

MALICIOUS

PDF

41.4 KB Created: 2020-10-30 02:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a705ebf61c58260c377d38289d9fe1fa SHA-1: ddb96c34856af31ab72cb53d64213408c6164ced SHA-256: 182d6b9fff2ae2f93b89c95bf0deb756652f7a95ea5f33e9a5fd41b747306a9f
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?keyword=wondershare+streaming+audio+recorder+crack In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f892b3b345c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f96cd03a743c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f907a7f9b85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_5f9b4a91726ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8c561f7afcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f936f4a685d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87c74e59165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8737048c9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5f93ad82ed0ca.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/dutimajizowa/48973559727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa11629c-f980-4e06-9e59-ed719a314b99/71200821494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40227778-006a-4fc0-8476-4e6f9abc9550/bewilene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5276/8666/files/7357017136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4029/0996/files/cordyceps_cultivation_book.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_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 5396 bytes
SHA-256: ccf6f8ad829b08746a1b6cf8110e83adcb1d582c4c08c834a8b188b78aa85c0a
font_01_sfnt_off000072db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DB 11184 bytes
SHA-256: c367120d08c7c6c4e861e5a65dd6b7adc9146b53c6f379acdac82488204f4e9f

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