Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d99250f5762814…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 05:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 466be5a49306e7cb63a1781140cd92e0 SHA-1: 48570e4fb391521ebcd36a8974f1134b49222956 SHA-256: e4d99250f57628149014167fe8bafb3cd1199500072e75f8163c2f19f57b19a9
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure related to a 'Mizuno 850 driver'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents, likely for SEO manipulation to increase visibility. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=mizuno+850+driver
    • https://static.usrfiles.com/ugd/b8c837_71eaf389f3d94dfd8354dcb8484d49b1.pdf
    • https://static.usrfiles.com/ugd/097bd5_e7efa2c1bba4453e870024a4ab711f93.pdf
    • https://static.usrfiles.com/ugd/2f8cea_41709fdcd1244fedb2f785d5160fc319.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/24791844054.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/nasm_assembler_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/nawep.pdf
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/59275449420.pdf
    • https://static.usrfiles.com/ugd/08fe48_19d5c53e72b44c80b5f7aa8b94c369a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b6f4437a048e1b1b8aa2b02122d92.pdf
    • https://static.usrfiles.com/ugd/e5a943_98d0e799ca2a4632ba45f72f249a1e67.pdf
    • https://static.usrfiles.com/ugd/63d3ad_2bac7078190743479acd75aa7bbca49a.pdf
    • https://static.usrfiles.com/ugd/5b604d_205d6145833d48bfb9f9ae65c162f755.pdf
    • https://static.usrfiles.com/ugd/7f16bd_8b77d651679f4d89a3ed59270d617548.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2e5d2036c146418585a26300aef531.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_off00006aae.bin
ef2794c29d9f1af50153bedf52291b6dcb048afe3c8a13d78d4b47d020ca94f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 4972 bytes
font_01_sfnt_off00007bc6.bin
e6068a1444c25d25e63ad4be8546d4330e130922b38e8cd1114b4bc169f01647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 10700 bytes

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