Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76da9a7247aa622…

MALICIOUS

PDF

35.7 KB Created: 2020-07-31 04:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dfc959702ce10e6742b9bac708fac2d SHA-1: 8173d7d94d94ef197c060f3da0b7ed27edfedcaa SHA-256: b76da9a7247aa6221136f9c8a0a180d4f3b38117fc9cffc582c29388237b6735
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a title about 'Hernia diafragmatica en gatos pdf', suggesting a lure. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, aiming to drive traffic to potentially harmful sites.

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=hernia+diafragmatica+en+gatos+pdf
    • http://files.lightpathdiscoverycenter.com/uploads/1/3/0/8/130874109/buvipowisarego.pdf
    • http://files.sacredsantafe.org/uploads/1/3/1/1/131164383/jowoj.pdf
    • http://files.lean-six-sigma-od-training.com/uploads/1/3/1/1/131164250/0bc3b6844be985.pdf
    • http://files.realmofricketts.com/uploads/1/3/1/8/131856543/jogemo_lipasaxularikon.pdf
    • http://files.lightpathdiscoverycenter.com/uploads/1/3/0/8/130874109/b
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/22838830227.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/16509497404.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/gezogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/bivuzami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/xapogogizafunavolam.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/fifodesuwulogojas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/jubisexeket.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/32474024842.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/bepudixaxoburogamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/funotixelevewavojebojaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/wetajigewugixob.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_off0000524f.bin
74f6528d7b5b7eec7d456c27562b5bc7dc9d48eb8bba5d3f1b7c02f6834d1866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524F 5192 bytes
font_01_sfnt_off000063d5.bin
a5cc4c23201d9200bdc74c03583151c566b321650aaf87175e09762f16caf72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 8852 bytes

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