Malicious PDF — malware analysis report

Static analysis result for SHA-256 de38e52d89f4289d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-09 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acfe66a5b43e7e1029d06b7a28e8d02a SHA-1: 02fc2439d30330672f18c10c897514444ea845be SHA-256: de38e52d89f4289dca700fcfe4883a77ec791934357b902757d7f1d3e1692bc7
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=auxiliares+de+comercio+costa+rica+pdf', which is part of a known malicious redirector infrastructure. The document's purpose appears to be to lure users into clicking these links, potentially leading to phishing sites or malware downloads.

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=auxiliares+de+comercio+costa+rica+pdf
    • http://pexufoma.warrencountyfoundation.org/uploads/1/3/1/3/131384635/gudogepumabof_juwivu.pdf
    • http://files.beatsbytheharv.com/uploads/1/3/1/8/131856539/894068.pdf
    • http://files.atbdance.com/uploads/1/3/1/4/131412032/naveteno_vixemavizozi_basife.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/27254612310.pdf
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/bosch_classixx_5_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/65758640816.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/lujusovekolopulopoporab.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/97809188890.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/12700506760.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/37100681500.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/96568046548.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/wibimunelutuwajutobado.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/gopimuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/97917800878.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_off000064bc.bin
03f8a75b8d713ab7374cf4a9142c3164d63e9ebef6c4d191c0c7a7f170473264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BC 5360 bytes
font_01_sfnt_off000076e6.bin
0fbcc3ce2265d1dbc946a142c355022c5753ccdb50cbc841897deeecf1db9e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 11380 bytes

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