Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1d806c4b16564b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 22:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3e66b729d54ccb7c22fd5bb8081e83 SHA-1: e6970e1d1a9f816de96e013dec14540ae2966c99 SHA-256: bd1d806c4b16564b8ab44c115ffdb200b810dcf052a52c9f07a3b47b25744824
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it's a malicious redirector, linking to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains text related to 'Anger management worksheets for kids pdf' and the malicious URL, suggesting a social engineering lure. The primary malicious IOC is the redirector URL, which likely leads to further 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.ru/pify?keyword=anger+management+worksheets+for+kids+pdf
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdf
    • http://files.metalmeltdown.com/uploads/1/3/0/7/130775755/36f932b68a.pdf
    • http://files.vivalavisa.net/uploads/1/3/2/6/132695416/312b8be1a88c.pdf
    • http://files.aascapedesign.com/uploads/1/3/1/3/131381464/goludojit-kudanewaxo-xofigerulazofoj-fakekuxupalol.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/raketabegixelidor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/derivative_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/99771854776.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/honda_crv_2010_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3408/files/najugiravaripap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/vitadikunumipora.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/vagoxoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/4598/5179/files/george_forman_grill_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/53912880294.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_off00006146.bin
14a3fdb234c6a2aa2879d430c6ddf8afb1ae27de9f4a999d3eb9c135910ea006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 5568 bytes
font_01_sfnt_off00007425.bin
3d69479abcbc89addfaaac3eff28eb46860c5d9190c01623a719e4fa5a7d6ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 10008 bytes

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