Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae55cc105a492cd9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 23:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f7242633fc9559511db039d6c00947b SHA-1: 7906b245dcfd56cc68f1e3468b0c68c009a26feb SHA-256: ae55cc105a492cd93c131c53e8edabf6b50e9212f2c4d2c6cdb7d734579ed203
120 Risk Score

Malware Insights

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

The PDF document contains a clear lure, 'Amazing english form 2', and embeds a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=amazing+english+form+2'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious redirection. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a broader campaign to distribute 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.com/wix?keyword=amazing+english+form+2
    • https://static.usrfiles.com/ugd/fb5067_13eab2b5d6534d5ab3d5781daca9b358.pdf
    • https://static.usrfiles.com/ugd/b9801a_6c5349614f46470d952bc422fcbc8100.pdf
    • https://static.usrfiles.com/ugd/625844_07bd86ddf9b84ff898860e58b5addf4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_195e3f0534ea465ca49fba8be2f43f65.pdf
    • https://static.usrfiles.com/ugd/2813e2_68ab27504a5c4120b34335b68e66c57d.pdf
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/k9_web_protection_browser_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/84631712962.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f08c09417a4dd1b0fbff13dde06744.pdf
    • https://static.usrfiles.com/ugd/3f0e57_10ab3f032246464bbe5673cb66cc63b0.pdf
    • https://static.usrfiles.com/ugd/5bb01c_900a44e8ee434001a6f1956cf40545e2.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_f0772237ff2741169959d3fc4652248a.pdf
    • https://static.usrfiles.com/ugd/432b07_f59b4d40fb1d4d289f5eccb36ecfc02d.pdf
    • https://static.usrfiles.com/ugd/9e41f0_906e48fa6e4a410b93ab7a6f4f1beec8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad930f9d705b458d8c3e80af9d8e9ac8.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_off00005ef7.bin
959479af5f8bc535598c5adf12754e50f4007f8f4e33a942b648ea428ea41675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 5352 bytes
font_01_sfnt_off00007107.bin
61c303395498d5d20f964cabe315e90395ce1608f1f53f8a8c531cbe78869b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7107 10508 bytes

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