Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebfd80da990722c…

MALICIOUS

PDF

57.5 KB Created: 2020-10-26 10:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 343719bd2c8f858db432e8ba32b4cdad SHA-1: 9baca1f1d6d5b65a68f3a4b7cce714514b602d95 SHA-256: 8ebfd80da990722c8664068ebd1a5b302e4c38cb7b684c25032c0e65306fb1e2
154 Risk Score

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://cctraff.ru/123?keyword=path+of+exile+duelist+guide+deutsch In PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/vimalozugo.pdfIn PDF document text
    • https://numibogag.weebly.com/uploads/1/3/4/3/134323011/8c8a8adec.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/5910241.pdfIn PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/kajijub_rereliwo.pdfIn PDF document text
    • https://sopizelofixafav.weebly.com/uploads/1/3/4/4/134438569/2775655.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://zuxubemusaf.weebly.com/uploads/1/3/1/4/131453996/wezejitufagat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/mejodamuzuvuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/koziput.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/38661198095.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/95211888559.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/87449012582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1968/8865/files/shenmue_warehouse_8_no_crate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2350/5859/files/bobble_water_bottle_filter_cleaning_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8792/3862/files/erato_apollo_7_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/liste_aliments_sans_gluten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5751/0081/files/rational_exponents_test.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/criminal_law_examples_and_explanations.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/building_construction_book_by_pc_varghese.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/dajoja.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a929.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA929 26708 bytes
SHA-256: 9a471e9a185bfbd89fda8c2e4730e28b208c7949a9fff647429f579180d800b3
font_00_sfnt_off00007467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7467 5256 bytes
SHA-256: f2966a63864500e442e6e6764ddcb4f87853f87dc0b478be4de09697ccb16edc
font_01_sfnt_off00008648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 10156 bytes
SHA-256: aad3d0ffefb0a14bf065878ebc562591f7bfc2374e252d836443ae5d079eca80

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