Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec35827275fcc37b…

MALICIOUS

PDF

50.0 KB Created: 2020-11-04 04:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4fad614369f341cb900e3043f67437fd SHA-1: 2be65b3ba33b8d3d368208d3f10c520b20c390de SHA-256: ec35827275fcc37bfe6e1aed0dab52e88ce1d6827aef0a6b543613bcec24c150
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.me/123?keyword=introspection+is+related+to+the+process+of In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f9cdd58c5efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f9c533054d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f9f831f0ba2d.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/c05f97b5-9126-459a-a1b7-332f0644d2d0/pimenarujudaginabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6cb71a-b9a7-4991-adf2-b9f51bbff1d8/pigokawufiwofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e421c46a-b623-4993-ba74-b6ce5b24d075/16307633066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736bbb83-0ae0-4a26-bbfc-3c752afdb817/95832512382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63825a8c-283f-4af8-9dc8-59085dcbd4a5/76752199411.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/sowiguxavixepikuwowewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9f16d8-b901-44ff-ab20-4466bd99bfb4/ana_andrade_oliveros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab926c04-4106-4222-9d98-6678a4cc688b/lamuruzewuzepexejijotipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb782a4-23f6-43ea-a491-984f546c5410/magic_protects_her_purity_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a304568-0d25-4d75-b9f5-0c71418564e9/6525221519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce337ad3-c6b1-4999-82f7-ef524de695e6/vufejeminawakugilimupa.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_off0000842c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842C 5180 bytes
SHA-256: d3cd7f3fae0fda3ef9fe5302dbbc3577bc2299901d2dc831a86b2ac75c4ac346
font_01_sfnt_off000095c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 11180 bytes
SHA-256: a5b818059ad34ea5b7d6700397becb3c374d9822262bdf96c5c29efadf35cc1b

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