Malicious PDF — malware analysis report

Static analysis result for SHA-256 c326e9c76bf0b7dd…

MALICIOUS

PDF

35.5 KB Created: 2020-10-01 19:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 907783cd4bf40401e0a172654ae5464f SHA-1: 364e555f7742d8fdc7e8fec62d2beac6952bed85 SHA-256: c326e9c76bf0b7dd092d9b6dbce7da506e2275b0bbf084e642914d5270bd22ac
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are likely part of an SEO link farm designed to drive traffic to malicious redirectors. The primary redirector URL is https://ggtraff.ru/strik?keyword=beauty+and+the+beast+gaston+piano+sheet+music+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same malicious URL, indicating its purpose is to lure users to potentially harmful 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://ggtraff.ru/strik?keyword=beauty+and+the+beast+gaston+piano+sheet+music+pdf In PDF document text
    • http://files.studio20-hairsalon.com/uploads/1/3/1/3/131378990/xemuzuvifejo.pdfIn PDF document text
    • http://tivesino.melissahillart.com/uploads/1/3/1/3/131384169/kolutasewafed.pdfIn PDF document text
    • http://files.tomkyfishfarms.com/uploads/1/3/0/7/130739250/ruvulobesane_zozudubujolone_nodemolalirenak.pdfIn PDF document text
    • https://site-1039153.mozfiles.com/files/1039153/zezaleniba.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/piwitudafowopej.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/webufox.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/69785989142.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/82453782627.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/1/0481/4058/3061/files/st_johns_catholic_church_albany_ny.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/nimixiger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0447/1707/files/differentiability_and_continuity_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1786/4869/files/brillat_savarin_cheese_substitute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1491/6766/files/epson_sublimation_printer_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5156/0341/files/3395041746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/cs_prerequisites_gatech.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_off00004b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B16 5732 bytes
SHA-256: 14e490ed3393de076061c30e2496376e592da222a2d237382ee41820375140c3
font_01_sfnt_off00005e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 10136 bytes
SHA-256: a9b3fd624572e757c005e3cc76ec984d08a1aa820d2879fbbddc1c8384ed5c34

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