Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb4c1b25b7c27dc…

MALICIOUS

PDF

42.8 KB Created: 2020-11-01 08:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e8ca6e28ce142ef1ff6e6f98293c6e2d SHA-1: b998c439273c6f67273eca17b80b6666725c730a SHA-256: ccb4c1b25b7c27dc13f5d492d27ee4e86ed2ca0ea7e3550c218b8cd87b48e428
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Eve trade hubs ranking' and a URL, suggesting a lure to external malicious content. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=eve+trade+hubs+ranking In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8e871bc3ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f99f945b05ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_5f9db15354f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f89f9907b8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5f9b2f70262a6.pdfIn PDF document text
    • https://zizukomeluze.weebly.com/uploads/1/3/4/5/134582384/gezisosafiluzobor.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/9b29ae34-a204-4b00-b93f-a147f3768157/pewefexifedemorasopab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e0dd9a-9631-4e4a-a039-fe6abe969d0c/200_pounds_beauty_full_movie_with_english_subtitle_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772b282f-07d8-4391-bf77-50bf1ce23693/6073451772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdd1d9a-9526-40eb-8321-54e956cefcfd/the_startup_owners_manual_ebook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401026bd-39dc-43ad-b0cc-385adec1d07c/medical_surgical_nursing_lewis_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2703/5846/files/play_store_download_for_android_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07373fc1-a751-4f97-98a9-ee24758aeefc/tezesogafovaruw.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_off00006a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A92 5276 bytes
SHA-256: a4499bf7d418a9c368fda8166a03deb80f8cf1e8d9b3026bfb24a5da0fc4a575
font_01_sfnt_off00007c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C80 10108 bytes
SHA-256: 9deef124a76446031ec3d170a8bf1a04c69f149b9d82e23ca6ac96bf91ad5576

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