Malicious PDF — malware analysis report

Static analysis result for SHA-256 e733d0cb990b7434…

MALICIOUS

PDF

63.1 KB Created: 2020-08-03 06:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e588d75f65f2d45477604f83fcc7b0e SHA-1: 1d2a8913cfef21f5716ec4822294c681800e0a4d SHA-256: e733d0cb990b7434baa6a0c5befaae44e7a2c8c429a7fb6d1d13aeff47159a7c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=dia+os+x', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting the document's purpose is to direct users to malicious infrastructure. The presence of numerous Shopify-hosted PDF links further supports the link farm characteristic.

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=dia+os+x
    • http://files.karinkopischke.com/uploads/1/3/2/6/132696174/2131202.pdf
    • http://files.acbees.org/uploads/1/3/1/1/131164556/231b9832b1338.pdf
    • http://files.nundahpetsitter.com/uploads/1/3/0/9/130968996/607758.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/17409685789.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/y8com_2_player.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/gepoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/76246601424.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/88620792826.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/43873360116.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/jasek.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/93302767283.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/hp_photosmart_d110_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15796621189.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_off0000b676.bin
dae88e387a2e104b2deff47c7aca91717496c58cb1b38b1eda068154533cfdfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB676 4616 bytes
font_01_sfnt_off0000c649.bin
985c19b9db9fe45958983903a98725d13fa15b2d11cd3ff358bb2c2eae2ce2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC649 13616 bytes

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