Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6eeb916259fa260…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 14:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bce1953da3d767d98464f1155185c3c SHA-1: ef24e6b5b62fbeb0ae0e003309aed758d1ef506b SHA-256: b6eeb916259fa260db254268f8fdb8113ae4f5044f054d62d02f5b4ba70327eb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm of 26 external PDFs, with the primary link directing to a known malicious redirector. The document body is heavily obfuscated but contains the same redirector URL. This indicates a likely attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

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/wix?keyword=open+office+.org
    • https://static.usrfiles.com/ugd/b8c837_4ffffdde1c9e46d99e8b814fb6aa3193.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b0f340cbc6d40aa8891f4a2860b948b.pdf
    • https://static.usrfiles.com/ugd/429b25_c855fe4773014b1e95e1cafc0184dd30.pdf
    • https://static.usrfiles.com/ugd/b8c837_7633cabb62dd4693a73f2fdea893d0b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c22188a4d1874ebfb824319da811562e.pdf
    • https://static.usrfiles.com/ugd/69b86f_5524f779032c482f9be84aa65076a79b.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_4ba43c56eef9457a8b6992ad6519dda5.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4871628f791742d6a33bb19d485a87fe.pdf
    • https://static.usrfiles.com/ugd/a31856_3e8e8509557f400f8bbd431dabf371e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca20a2ffa5a433c9e4f573b849144fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/manualidades_de_papel_para_nios_de_kinder.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/an_introduction_to_core_topics_in_alternative_investments.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_off0000789a.bin
bb8ec615ccae5b10b4dded398e6f548d1f3a86ba756f0baaa2d4b05c8498f985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 4824 bytes
font_01_sfnt_off00008922.bin
cf61941f2935f560bda718b8c7ab73e350471fdc71f21134535080c478ba3dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8922 10316 bytes

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