Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec58c7eb7bf026e6…

MALICIOUS

PDF

63.4 KB Created: 2020-11-03 07:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e28947bf828255ac5963d1e62ad7788c SHA-1: d3445c7d3cb8ad57fdbf85fff50cf562c9054b53 SHA-256: ec58c7eb7bf026e62e497e9a40003f173b13e6355dfd044b3b88a9490a5c5dc1
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains the same lure text and URL found in the heuristic. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links. No scripts were extracted, but the embedded URL itself is the primary indicator of malicious intent.

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/123?keyword=sony+liv+app+download+forpc In 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/e65d82da-d7b2-45e5-92fc-bcf9bf988f54/xabitifiregun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed55ef27-c57e-44aa-ae30-11ad7887a02a/virtue_and_vice_fear_and_loathing_in_las_vegas_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/24714452617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2118/6718/files/vemana_padyalu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/19779769198.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/martinique_vs_mexico_en_vivo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/96054165302.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/copper_peptide_serum_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0836b5-b8e2-4b23-9116-d74b38399134/geruxupidur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf39ef7-8e81-4bd0-b72c-e98b23de51eb/81036284315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8456/9494/files/tufozikuzibutug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0019/0905/files/guwibipimizosititaxagiwir.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_off0000b9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D0 5328 bytes
SHA-256: 5a95adba62194a7afedd7b46928e6b09bed5e8dee05a592261e74fda1d19f9a8
font_01_sfnt_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 10728 bytes
SHA-256: 18409bd7ec7edfbbd60ef43efcc66995de71e9183ab3e5542a28e6be4d5407a6

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