Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffd6d3d58cafdc3…

MALICIOUS

PDF

52.5 KB Created: 2020-10-27 21:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 166ae2aa6307787ed5504dd1c9e3a420 SHA-1: d77c7e48e4d66c1d640313068e1f8da2021735a2 SHA-256: 6ffd6d3d58cafdc336e6be38fdc9b1dcc7cfaf1c75226460bd3500f7d7586efe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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://gettraff.ru/strik?keyword=common+five-lined+skink+diet In PDF document text
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/9528432.pdfIn PDF document text
    • https://zilasemewoxuj.weebly.com/uploads/1/3/4/3/134318224/votanuje.pdfIn PDF document text
    • https://xadaxiwunitari.weebly.com/uploads/1/3/0/8/130814235/3b662d8a.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/ac09cc34-3abc-4051-94b9-1e9d226289c3/87328210711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70deb33d-415b-4663-9d97-c998f5d9b69a/42404290783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c418b5c7-23b3-496e-a484-54763b07867d/ruwugisaraxapezuzaderu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870ba6a3-3e5c-4b13-9e79-02aea93bf73a/fegumisaluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09f649e-6052-484b-9145-5350bcc56613/fulewaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11aa69b3-8695-4930-8a72-f4a348a81c57/mojejedavod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db548dd8-2818-488b-a6a1-9f2bd237f162/32297797972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759d58f0-1f99-4297-bead-a8083a0b3be3/78579455394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14dd2e5d-9f68-4ffb-884a-dcf33537cc73/starcraft_2_full_espaol_mega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c803a57-7088-4271-a893-66bea04b4159/wanozasaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0a93c4-fce6-4f88-abdb-3fa868602630/sipulolifeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/pokemon_white_rom_download_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2635/2797/files/48_quart_cooler_igloo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6191/files/pemuvebisabaseloxeliwel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2772/8037/files/crawford_middle_school_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4986/4353/files/36333411708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/1158732013.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_off000091dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 4808 bytes
SHA-256: 746dc5c592e4beb6f65f5d489fafe22ad88abdf4e1053c50d914e4acc8679a48
font_01_sfnt_off0000a238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA238 10148 bytes
SHA-256: 3676417987ff99bf79c8d4a19de3e9aca9a5294680e3dedfeed19973d74ee38d

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