Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3b5639ac1db1b2…

MALICIOUS

PDF

41.4 KB Created: 2020-10-31 12:38:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c00cc08337d58068650ce7bfc240e720 SHA-1: 2f7765e2bf3ce02d1c86a0488a6dc481652cc8a6 SHA-256: ce3b5639ac1db1b2e86abd5294fd4637cacb66424859b0633dd3640a090a3c5d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector link to malicious infrastructure. The document body, though heavily obfuscated, contains URLs that are also present in the heuristics, suggesting a link farm or SEO poisoning attempt. The presence of a remote-support tool lure heuristic indicates a potential social engineering tactic to gain unauthorized access.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=rock+me+cherrie+lynn+pdf In PDF document text
    • https://fuwurugosudopo.weebly.com/uploads/1/3/4/3/134326966/zatogaxirajov.pdfIn PDF document text
    • https://nabisipiguges.weebly.com/uploads/1/3/4/4/134432296/xomamalafadoju_nojemowodi_valugimilote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f9d07cf95bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f949836c27ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f9d285bbb12a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5f8ea5212988d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8e5dfa99290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5beb70f-77bd-4305-9dc3-1929073e75fa/remembering_whitney.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4798/2521/files/bain_capital_double_impact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f16002c-9202-4c73-b05a-eb8bce354bb6/22679445293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee328e0c-22f7-4f29-9694-3f5d23293adf/bigigogezagate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df2ace1-631a-4d76-bbde-b666456876c8/ganalolabob.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/88329365245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57378a6d-348c-496f-9225-486967edf4a7/apk_for_clash_of_clans_mod.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_off00006266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 5180 bytes
SHA-256: 8a43e6ee79ffc18d9075b76ffa3b1631a9f287b2ed6bdf56db48007c84f00974
font_01_sfnt_off000073f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 11152 bytes
SHA-256: 30bc0bce21710f193d11c6a8b6b656accc9ba32efb30201fc7eddec9d7cd6b07

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