Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3d3c66472d7f32…

MALICIOUS

PDF

43.7 KB Created: 2020-10-28 22:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7c14a9c1ad3cead932f2ae534b815078 SHA-1: 922f72455f8fc4918e65189baa71c6ce5a28ee5c SHA-256: 7f3d3c66472d7f325f05e110a65f178c4da013377e97125f576484f1bb666d40
94 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.club/123?keyword=solving+polynomial+equations+worksheet+pdf In PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/035d160385dd2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f873ebeb1e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f894b17c5ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f8e2b7779759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f8a229e5c3a9.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/zesegidewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f8cfeb746e73.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/poziwigodupepuzimaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f878177494e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f941a44abc9e.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/fasanag/peter_drucker_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79da625-5c54-40c8-821a-a644d001d254/bimoxomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ab8210-0034-4f97-868b-190680279175/98011012926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5221/1620/files/directions_to_michaels_plattsburgh_new_york.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6014/0476/files/apollonian_and_dionysian_views.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/personal_development_plan_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/gmp_guidelines_health_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0774/4666/files/bpsc_calendar_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5951/0425/files/6224536091.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/canon_ae-_1_manual.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_off00006861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 6000 bytes
SHA-256: b70306316864617a00db4bb04c82219ea76ed95456e4c2e44e3b618e62c48ab3
font_01_sfnt_off00007cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 10888 bytes
SHA-256: 62b95c759748de330c8d9a94cdf55d66f04c0c1bd9fb4da0c857d8ac41252639

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