Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51eca0bb5710041…

MALICIOUS

PDF

46.0 KB Created: 2020-10-28 06:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be842fa2b73f622df6edf75c867a5ba9 SHA-1: d3060ce284d15dc01f4166f9ef19a176a0c24bb4 SHA-256: a51eca0bb57100416e8fa04fcaa7751ba24151890a1568df2737e027596a3b93
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.cc/123?keyword=6th+anniversary+gift+for+husband In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5f945d07a3df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f95e13f223c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5f95545152d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f95d75648270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f8f31abee4c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2ea1981c-c8b4-4e7f-8468-7179c5b363bb/kagejom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a5968b-0d20-4d8e-ab2d-aa1670c82704/14059103649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225c212a-75be-43a4-a7e1-274b9b1b4d99/90333868337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bece54c2-1e4c-4b0d-afea-630e36b902a9/dalulevupifeg.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/anticonvulsant_activity_of_medicinal_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/41837712795.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/apporter_des_modifications__un_document.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/hdfc_mutual_fund_sip_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/atomic_structure_and_bonding_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f683a0-1b28-4045-9b22-ccaf29b842d6/47572363130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb05a21-355c-489a-aa18-66c87269fe7b/94195371248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9473087d-47bb-4fa6-9737-5edc59a3ce62/modaboxabuvopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea82543-fb60-4b34-8190-c1666fe7b901/24362374197.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 5380 bytes
SHA-256: cffc59ecac4e32a3c03864285e78b67551cc5b730c07996ca7af577874e8fe6b
font_01_sfnt_off00007a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 10332 bytes
SHA-256: 97b875e47097a9f4bbc11b09b3b2ec06819d6a29f14b890ddf686bac5f01c2b6
font_02_sfnt_off00009d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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