Malicious PDF — malware analysis report

Static analysis result for SHA-256 817c3b2462f2ee2c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 12:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0538513681ad8fe674eaa36de6174ee SHA-1: 8da9e90bfb0157fbebfef105928c7bf511ed93a0 SHA-256: 817c3b2462f2ee2c579b9850e72b397d4a9736abb3cebc65d707a1e1fb4ce37e
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 'https://ttraff.com/pify?keyword=diaphragmatic+breathing+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, identified as a link farm, further supports a malicious intent to distribute or obscure the true destination. 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.com/pify?keyword=diaphragmatic+breathing+pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • http://files.blainegonzalez.com/uploads/1/3/2/6/132696128/gozawejefin-dopenepaminibuf.pdf
    • http://files.key2evolve.com/uploads/1/3/1/3/131378990/4207032.pdf
    • http://xalib.coachlightconnections.com/uploads/1/3/1/0/131069839/1490568.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/voting_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/nedifuxedebewikasibuwolex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/ludus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/jutosoja.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/gotirobenoxorokefupase.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/18784098861.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/regepovuwonixut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/36698519316.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43127542751.pdf
    • https://cdn.shopify.com/s/files/1/0447/1400/0540/files/libro_para_aprender_a_dibujar_manga.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/duplicate_rows_in_excel.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_off000067c8.bin
2f1f29a8ee3d00f86eeb32ac959321ad92be77ad49a9e3cb9b7083331020317c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 5500 bytes
font_01_sfnt_off00007a4c.bin
e5fc5de1e029f1018186deebbacc8f7659d6450a6192ef6fa0d8dd6bb58a2607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 10172 bytes

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