Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cc3673e6ccfd88…

MALICIOUS

PDF

49.4 KB Created: 2020-10-21 11:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2172ceef628d1e85e66b2b1cf572298b SHA-1: 1a12468bf6553a42e4e5391268f9b055950aaaf0 SHA-256: b5cc3673e6ccfd8833c633d0d52debabdfc8d3cffd7e932243e489ce376d6fb4
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a link that redirects to a known malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF as malicious with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=diccionario+que+significa+la+palabra+languidecer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f89fa451eb5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8d5f5421ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8891073be91.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/266f7ed0-8282-4a0e-b909-6b1caf1c229a/fafidoxapakakowobozuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb165b92-48b9-40f2-ad67-70a6c8151e9d/36395127671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba3537a-4dfa-4d96-a7ea-1e7c39c92838/38428135586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054237a6-4bab-4f9c-945b-0d93040abe90/77684364291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b32b366-3c83-45e0-b9cc-35295b54739a/75545281369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908dd6d9-8f3f-403d-a5e7-a3023aceac6c/tabatarovixodifumone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a3d644-dc95-46c7-a6b7-d40ec70c5496/25672733681.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/siferaxex.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/83500856488.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fusatesatewaxesagik.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bearing_size_file_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/kopafanosekejuvobu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/87465516448.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/ligolafufelajawopoleti.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/english_active_and_passive_voice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/36342649843.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/47035715523.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/translate_chinese_file_to_english_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/neolithic_culture_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/wizametutizovor.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_off00007f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 5588 bytes
SHA-256: 9facdb23a7dd473c8aebdca7c66a4d5c9032084189286184b66fcfe145556b8e
font_01_sfnt_off0000922d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922D 11104 bytes
SHA-256: a0d8d218614cfd00ac0eef2968f9752d1f79c3d00b8b732627455208f4cc4baa

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