Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e8ca08f426ceb0…

MALICIOUS

PDF

47.0 KB Created: 2020-07-24 02:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86776d950ffb31157c11c4a15a85303c SHA-1: d443b2317127396a8885670db5386fc30a749990 SHA-256: c8e8ca08f426ceb04f05080d2e87737d2f4fc7c25ff463c6a9714d6aa44b03d2
120 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.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was programmatically generated. The primary attack pattern involves redirecting users to potentially malicious content via the embedded link.

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=icmje+guidelines+for+authorship
    • http://files.camartco.com/uploads/1/3/2/6/132695862/befiron_savupedobeli.pdf
    • http://files.geneticcircusproductions.com/uploads/1/3/1/3/131383333/govoponodu-tamonozibax.pdf
    • http://files.noticias-today.com/uploads/1/3/0/7/130776521/3725328.pdf
    • http://files.michaelderjabin.com/uploads/1/3/1/3/131379059/7918897.pdf
    • http://files.camartco.com/uploads/1/3/2/6/132695862/befiron_savup
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/41745101542.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/rinudiwolebesixepiralo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/58435485386.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/tevafetujewonavatunegom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/gevefadetumemaxuzuwipol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kiragin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/65325431613.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/43267410676.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_off00007bf6.bin
a1892a21f56179f0e9fc4d936e1df5f31062fce5bbe7f40e73376165242feb64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF6 5464 bytes
font_01_sfnt_off00008e5d.bin
4f63ee6a1348d5e238c224d575b07229a6ce5c61fcbf02c5b37bec5c6e5b7b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 9632 bytes

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