Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ad9e2777032852…

MALICIOUS

PDF

75.9 KB Created: 2020-11-02 21:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 61da29c50b91b8a1b13a89445c43aacd SHA-1: 2b2905a7dac0a4442caa987dd6c7dea8f7354d99 SHA-256: 50ad9e2777032852e11bf7c5d5d7573431769fc89d86b8b60e17ebd1179642c7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files, a technique often used for SEO manipulation or to host malicious content. One of the embedded URLs, 'https://ggtraff.ru/aws?keyword=gone+by+michael+grant+book+pdf', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=gone+by+michael+grant+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_5f9568389a495.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/texupumivure_lujetekes_jevivuwutogo.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/fa6714a9-2b12-4be9-86bc-5abc212ba25f/givolejawozuneraweguwefad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0858fa9f-dc41-46c8-8131-35c0a2395ad5/69019540446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4772896-17c1-460d-b642-49653749ee59/el_tao_del_jeet_kune_do_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3c9235-74f2-47e7-b2b4-0860f3ba2ee1/32200895393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269e3e2d-e8f0-4381-8bb7-1afbff2df3e6/xeruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/fort_lauderdale_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5179/2546/files/bolumamavelaruxozamum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcee60b-e76b-420a-86d1-06a54dc7403f/soa_past_exam_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea927a0-d181-452c-b867-e67f10d6678e/nugun.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/genetic_algorithm_nptel.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_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 5728 bytes
SHA-256: 7d0c6f239d910d1949c34184e4585e828f12c5ed9b7a2070b75f4cca88391790
font_01_sfnt_off0000fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 11608 bytes
SHA-256: 4fd3cf43e160220ef964e2fdd71715aaa494ccc952d1668a4f7e205f40fe804e

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