Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e9de918f7b60e0…

MALICIOUS

PDF

44.3 KB Created: 2020-08-17 04:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3fc991a2ba49de505ff2ba36f9bce08 SHA-1: 1c55a0084d0b58e97ce5f7e1365b62085bfba739 SHA-256: 51e9de918f7b60e059ccac749a54f9d400e25aa85fff6db26cd9d6b7a7aea658
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=ada+guidelines+hyperglycemic+crises+2017', which is flagged as malicious. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to redirect users to harmful content.

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.ru/pify?keyword=ada+guidelines+hyperglycemic+crises+2017
    • http://ranode.holyisland.ie/uploads/1/3/0/7/130740145/letikubup_vesixevefa.pdf
    • http://files.caricature-portraits.com.au/uploads/1/3/0/9/130969503/1168195.pdf
    • http://files.labellavitaitalia.com/uploads/1/3/0/7/130739783/bosazazawo.pdf
    • http://files.goodworksbuilding.com/uploads/1/3/0/8/130814118/7899144.pdf
    • http://levukogox.namctristate.org/uploads/1/3/0/7/130740025/9183508.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/70867108263.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/19424902868.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/65146647986.pdf
    • https://cdn.shopify.com/s/files/1/0441/0910/3256/files/android_marshmallow_6._0_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/shrimad_bhagavad_geeta_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/linedancer_magazine_step_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/83178625643.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/69893529091.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/microelectronic_circuits_7th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/73905896156.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_off00006da0.bin
65b8a43743d2d3f11f26fe3f121b084a0897873c70f1e5030fa514e71f4ab449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5984 bytes
font_01_sfnt_off000081e3.bin
859ca0dfd9ffe20d4cba418f65cb75440f883c1869aa6979b1723a2f389a0097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 10160 bytes

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