Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddf85908a9971ed…

MALICIOUS

PDF

37.5 KB Created: 2020-08-22 00:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c93de93859ed5fa0db4fb1b5ac96f9 SHA-1: 43dbb0e51406f66b6ea610ea326dd0ecb411b73f SHA-256: 4ddf85908a9971edad0fc28e86267cd4661f09eb93c1e9ecb5597bc5be13bcb8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links. The document body, though partially corrupted, contains a URL that aligns with the malicious redirector finding. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=bagpipe+sheet+music+for+going+home
    • http://files.elliotgardner.com/uploads/1/3/0/7/130775679/niredovevifijamolu.pdf
    • http://files.stbrendansreds.com/uploads/1/3/2/3/132303024/turidibutira_kesanekafasow.pdf
    • http://files.utaps.org/uploads/1/3/0/7/130775191/8226270.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/pdf_bhagavad_gita_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/32874749936.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/73185929194.pdf
    • https://cdn.shopify.com/s/files/1/0462/3908/8794/files/gekodepab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1306/files/metodos_anticonceptivos_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/75205227153.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/50007108679.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/bescherelle_espagnol_pour_tous.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005474.bin
04b17bbe61adbf3576677bdec55d53821193d215f5a505a85a7845463ef852ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5474 5444 bytes
font_01_sfnt_off000066db.bin
b5d693883346a5f178fc73b287e5d9293a8f47392935507955d2108c088b388d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DB 10016 bytes

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