Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e169f90b50bde39…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 07:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d11fbbdf7880556e01512ce23fd5a6 SHA-1: efa02541bfeca5bb6119e8702dcb43228ffa4166 SHA-256: 9e169f90b50bde391921fc4dfbdd5dfd19e5deb02a54f580b90e17ed9d062eca
160 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Aadhaar enrolment update form' and includes the malicious URL. The presence of a fake CAPTCHA heuristic suggests a social engineering attempt to lure the user into clicking the malicious link, which likely leads to further compromise.

Heuristics 4

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/wix?keyword=aadhaar+enrolment+update+form+how+to+fill
    • https://static.usrfiles.com/ugd/d94ae5_3b2845eb0399459289161ac99192ff0a.pdf
    • https://static.usrfiles.com/ugd/c12414_d8f77821c971470496122b7a458875c5.pdf
    • https://static.usrfiles.com/ugd/dd4472_2ec0f62e6a6a4731b20213b7dd51ad07.pdf
    • https://static.usrfiles.com/ugd/8b2c09_e06f015bc5014f0ba3f1d88f1a91561a.pdf
    • https://static.usrfiles.com/ugd/a4d998_f88ee0a1e1524856aa035fb97c0d1af3.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/register_for_self_assessment_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/mathematical_analysis_by_malik_and_arora_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/22019829499.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ebf9c5e16540a4b39fda9a22bbf247.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_7ec04cdc62ac4064bd0d7676e9ddb578.pdf
    • https://static.usrfiles.com/ugd/ce5d00_e6cd4d37a1ff4e05ac72456870417cd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_153e1287329848209452019ea5d5b110.pdf
    • https://static.usrfiles.com/ugd/e6092c_539e1bf8912e4dbc9f0a68dc79566eee.pdf
    • https://static.usrfiles.com/ugd/a43ec6_6e85e16cb8e142d0bda76e2fa38c775d.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_off00006783.bin
5db8453c8dab6b3107674bbebe6554b94aa328f0ae97435a1af50ccdf576d32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 5184 bytes
font_01_sfnt_off0000790f.bin
364a0fdab4980071b08afdaed8d6193c31578ddb9f56afac9856aabebe09cb95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10160 bytes

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