Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4eb1e6bdd167766…

MALICIOUS

PDF

43.4 KB Created: 2020-08-26 03:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055b0fd803b9109f185a06dd74e4284a SHA-1: 8d8e579d3875a72e7162b2db91351583f911496a SHA-256: d4eb1e6bdd167766ce31e698eda132f54ce7cc27c4f6d78948c7cee5a3f653c9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further supports the malicious intent, aiming to distribute links to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=mis+sentimientos+erroneos+silvia+olmedo+pdf+descargar
    • http://files.derrettphoto.com/uploads/1/3/0/7/130739951/6971271.pdf
    • http://mivop.elementaryethnicstudies.com/uploads/1/3/0/8/130874066/41f1cd6c.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/vopivul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/1675305752.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/manualidades_con_botellas_plasticas_de_navidad.pdf
    • https://cdn.shopify.com/s/files/1/0440/8472/3864/files/whirlpool_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/53725818102.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/earthing_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/whirlpool_tumble_dryer_repair_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058d0.bin
1daf25968275ee9cde736ffb66d7fc37414071da8bccdf031e0431f621080ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D0 5328 bytes
font_01_sfnt_off00006adc.bin
839ba934f454a3d2b801d2d881cd78517b2f10a5aaac578a96d027f44c78b7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 11620 bytes
font_02_sfnt_off000090ba.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90BA 4324 bytes

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