Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d4ba116b837be4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 06:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5460a14e8b8060ee43e240355ae587c SHA-1: fb79e836404057f0e23e13a0e15deaca2f7995bc SHA-256: 49d4ba116b837be4572b7bc0218ae2f8849d06c74c3a83801e3db111f498b59b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which likely serves as a lure for users to download further malicious content or be phished. The document body, though heavily corrupted, contains the same URL and appears to be a deceptive lure related to a 'contrato terapeutico psicologico'. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=contrato+terapeutico+psicologico+pdf
    • http://files.gameaccess.net/uploads/1/3/1/6/131637108/d3084b3a90447.pdf
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdf
    • http://pajener.thaischool.org/uploads/1/3/1/6/131636825/163995.pdf
    • http://jobowudig.verplanckfire.org/uploads/1/3/1/6/131637024/rasuzagoluwoku.pdf
    • http://files.christopherwongld.com/uploads/1/3/0/7/130775952/6650693.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/dunuzezatodatodiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/86083061522.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/62096787169.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/nevunefazomolejebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/losipuvu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/hallelujah_trumpet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/nulapofafoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/20238432523.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/wobusavowib.pdf
    • https://cdn.shopify.com/s/files/1/0464/5050/7944/files/xasotejaparexuzo.pdf
    • https://cdn.shopify.com/s/files/1/0463/1884/6112/files/40550092656.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_off00006716.bin
13ff4a07ff6a463368c4087a9c94a973166ace5bc92b44b61a08c8b0402cda41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 5228 bytes
font_01_sfnt_off000078e4.bin
f26ebc47a0cc499e86c3fc315ab17f3f4649ae810aec5f632763ba5a3efb3e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 10528 bytes

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