Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05ff76cedaa6402…

MALICIOUS

PDF

67.3 KB Created: 2020-08-01 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa5789b908307e9b833d20f5fc74479 SHA-1: cd8272c7996a9b29b31ba64f5396e1c9d7a5ad65 SHA-256: c05ff76cedaa6402ff7d9f6058a8e4db867453af19d47047b1e19e3852f5fa40
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a programming solution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the embedded URL in the document body, 'https://ttraff.cc/pify?keyword=predicting+the+temperature+hackerrank+solution', is the primary indicator. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=predicting+the+temperature+hackerrank+solution
    • http://files.baw-weapons.yez.dk/uploads/1/3/0/7/130739974/fugekeseruxupi-mipeparesudox-pegukisozu.pdf
    • http://files.newnanfootball.com/uploads/1/3/1/4/131438563/27c732.pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://files.sjjmc.org/uploads/1/3/0/7/130775309/xidepinogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/laxipuzun.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/suxidojodamumijamisafeko.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/dokofinusojavajejufoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/24515509804.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/53029229037.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/30881231453.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/rizupakiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9605/files/94104069788.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/kelotuwagulenex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/buvuxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8760/1559/files/20731696620.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_off0000c0f9.bin
765a82ad0ff55a72a5fc3046aede15719a8e944a394c91609ef3476d7b31af2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 5552 bytes
font_01_sfnt_off0000d3a9.bin
445b2c12ea6e527984f35fd10466f5d62fa63a69ab9dd7e360c4fd3802297303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 13812 bytes

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