Malicious PDF — malware analysis report

Static analysis result for SHA-256 8124df6a534b4034…

MALICIOUS

PDF

47.2 KB Created: 2020-10-01 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8687c67651ff688abe3abb7f70c6aab8 SHA-1: 61088dfce072119e76f40f15ee7f6b1c3c7ebf18 SHA-256: 8124df6a534b403492392987133251fdc7e9b7aab5ec822366dff65cd975ea8c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The document body, though partially corrupted, contains text related to 'captured by raiders pdf download' and a URL that is flagged as a malicious redirector. This suggests the document is designed to manipulate search engine results and redirect users to malicious 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://gettraff.ru/strik?keyword=captured+by+raiders+pdf+download In PDF document text
    • http://files.quilterslittlehelper.com.au/uploads/1/3/1/4/131438582/4723626.pdfIn PDF document text
    • http://files.rosamarinaboutique.com/uploads/1/3/1/4/131406558/4455350.pdfIn PDF document text
    • http://xufed.coachshi.com/uploads/1/3/0/9/130969873/nabifumifikas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5170/4469/files/podasojokowap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0531/2163/files/tap-_windows_adapter_v9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9787/3831/files/gubefivibapefivafepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0314/0517/files/agile_project_management_with_scrum_microsoft_professional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137321cf-fbc2-44a9-9aa2-0cfbc3af48b8/nebopibabelefomumapemeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1355ac2f-1580-4dd2-b8bc-f0e45852a468/waloriludadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e053d5-9c5e-4ac9-9edf-95ee05cb44e8/digexapolowekironanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/14198723468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/70971459996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3077/6478/files/20_foot_hdmi_cable_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/annabel_lee_poema_espaol.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_off00007c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 5272 bytes
SHA-256: e20af2b110c98a2d2fc85a9bdf54d7accbad3312977009415fcef7c78f41797e
font_01_sfnt_off00008e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E09 9892 bytes
SHA-256: 750bf297da18e08ddd22c0c342c2456946eac26cfe986ec41e84c69fce0d4045

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