Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ad1369349d0275…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 05:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586792efb03cc8e905ee4333f4750a1c SHA-1: 0d5fda3a33264c7ea84d097a2488f62ab4b2af41 SHA-256: b8ad1369349d027562020f4d57867daa14ac8ad075f868d542e11720bc201eec
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The primary intent appears to be redirecting the user to malicious content via a link farm.

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/wb?keyword=rood
    • http://files.neisdoap.com/uploads/1/3/2/3/132303378/4333660.pdf
    • http://files.10000wordsphotography.com/uploads/1/3/0/7/130739142/misij-tepodewerag-vafex-niterejajuzi.pdf
    • http://files.madebeautifulby.com/uploads/1/3/2/3/132303219/nudaruwavofotu-mutajotus.pdf
    • http://files.dodoskinblog.com/uploads/1/3/1/3/131379085/6712195.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/plotting_rational_numbers_on_a_number_line_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/90311998097.pdf
    • https://cdn.shopify.com/s/files/1/0437/4963/8295/files/46039180509.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/pilokovarixawokasolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/steamboat_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/22323962797.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/fabupisexomepotox.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/81725562316.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/wugosogajepidisojuduwusu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1904/1954/files/how_to_use_vlookup_in_excel_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/74418369550.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/65416773049.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/40235324462.pdf
    • https://doi.org/10.15621/ijphy/2019/v6i5
    • 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_off00006f20.bin
6e4e82d8a26f29d4b4040df24a2520fe54446e9e81081a50116822233639817f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F20 5356 bytes
font_01_sfnt_off00008165.bin
198ba1a0ebf3ab7668ca38be85d14e1921a2f3a87a6437df33e224f74ca20bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8165 10104 bytes

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