Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9678b3c7cc5b24…

MALICIOUS

PDF

42.1 KB Created: 2020-10-28 05:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b0d4be1a126107d08f9d8e0cdc8920d6 SHA-1: ea466fed2bd313156de2f073cbcf0ca62fe021d8 SHA-256: 2f9678b3c7cc5b24eb4b8ebdc594253d9cb358abce91a7a3e2b6cd4942a222bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'dangerous dogs' to encourage clicks. The presence of a link farm heuristic indicates a high volume of outbound links, likely for SEO manipulation or to distribute malicious content.

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.ru/pify?keyword=top+10+most+dangerous+dogs+to+own In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/1890735.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/8066348.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/108d423a893.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/litunux/50944582105.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/wupeluvofapunowiwozi.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/20926948707.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/46057833466.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/alfabet_po_angielsku_dla_dzieci.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/vusofitilusarolar.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/skripsi_akuntansi_perbankan_syariah.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/5933561503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5322/3588/files/jijolosevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/54165911602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5780/2137/files/sandisk_flash_drive_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/29082257349.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/lavivufanamoxetekilob.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/definition_of_remedial_teaching.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/ralodabusagepira.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/remuruzalob.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/conflict_between_autonomy_and_beneficence.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/wozenetajipipipugeradir.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_off00006540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 5484 bytes
SHA-256: bd0fbd092e123c6e0a8aa6f6f8fc1c123d42a50c5a661bd2ab1ad6b12cbca831
font_01_sfnt_off000077e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E0 10364 bytes
SHA-256: d7d8e53c6f99e5544b51b4f2077c0aadffdae6a456f6dd6604ded1c0f72cc2e0

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