Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f2eb9b1c9ce125…

MALICIOUS

PDF

40.4 KB Created: 2020-07-28 10:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ddd640eba01be7454f6f820f50fbce SHA-1: 5beb1f65640a03e817282f14a33a9933f0b9d047 SHA-256: d1f2eb9b1c9ce1252d3d0403d2bd3276ff5fe07faa10f693831526afb5e5882a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=behold+a+pale+horse+audiobook'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes the phrase 'Behold a pale horse audiobook', likely a lure to entice clicks on the malicious redirector.

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=behold+a+pale+horse+audiobook
    • http://files.thegoodloaf.co.uk/uploads/1/3/1/3/131380942/zerinobilidini-zikizagikulol-dubiwaluwi.pdf
    • http://files.cramerpottery.com/uploads/1/3/1/3/131398374/tapelodowanop-vodeziter-fawibarazowisuz.pdf
    • http://files.reseeworks.com/uploads/1/3/0/8/130813841/d5723.pdf
    • http://files.bluegrassstream.com/uploads/1/3/0/7/130775373/pekobu_kanuwupi_vuzazuso.pdf
    • http://files.alhasoob.co.uk/uploads/1/3/2/6/132696015/2388652.pdf
    • http://files.alhasoob.co.uk/uploads
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/52836411744.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/natefu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/84789091505.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jojowisine.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/41421539580.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/waxofusegeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/kukirelafazijemiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/rivavedurawetosevutorum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/fivexakeneg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/giruteg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/newakulex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/51529121456.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/25017509226.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_off000061ba.bin
cfee00baa6bbca292af740a567192334044f4818930ae5a73321966d902d7797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 4996 bytes
font_01_sfnt_off000072b3.bin
4e51cc6110556b19a52749f93dc274544ea46d50dea8a28c4526c95e7ced218b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 9800 bytes

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