Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91b64907c21f4ed…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 03:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f58b46b43de0395838a4b071bf70138 SHA-1: cac1967bf910395e7699c1f7d210a1c3aa110717 SHA-256: a91b64907c21f4ed2fe9a9263304209c4eac6e70d247ffc0852d95044448acad
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as game cheats for 'Hungry Shark Evolution'. This link redirects to a malicious domain, ttraff.me, which is flagged as a redirector. The document also contains a large number of links to static.usrfiles.com, likely part of a link farm to improve search engine ranking for the lure. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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.me/wix?keyword=hack+game+hungry+shark+evolution
    • https://static.usrfiles.com/ugd/b8c837_e4438fe6359b4f5e82817bf1acb6140d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8b9d94ec0b4a0fae69286722a40717.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2813e3612024092b46563c5f60a23ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_a76236dc6014450881049cea60c599ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8ade5e9a72a46d2a013f43be6f77b37.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d9ffaeceb504c518a6638ab40a23277.pdf
    • https://static.usrfiles.com/ugd/b8c837_761b9148caf1494e9b92c5d24bcd24fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_de1982beb60f4633a0fc9de9b3d86fd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_65753c6de48c4181ab587ea8a8e608a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f930eeefe54607b2a09fbba739838f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9522a37077854400a4d90deb1b986093.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_off00006369.bin
36a4b22b004717aa3a0a3459bc67ee9814bf330abba044b1a13d81f809368bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5400 bytes
font_01_sfnt_off000075ad.bin
b0777ffb8830ae20dbe9751b2782779172ffd90712f9fa4be4ed352ea74d244c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 10980 bytes

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