Malicious PDF — malware analysis report

Static analysis result for SHA-256 39252a3d0b9d47bd…

MALICIOUS

PDF

47.2 KB Created: 2020-09-05 03:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d40cc6b2212a95dc8b843fbeb73864 SHA-1: 4471c65ada73f1b0cd0c6550fc2ecc87ce61b569 SHA-256: 39252a3d0b9d47bdec42555aa0006dbdf8d48413dba83a3a7e37d2b245c1e7c3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a redirector that, when followed, leads to a download for a Microsoft Office activator. This is a common lure to trick users into downloading malware. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation to improve the ranking of malicious download pages. The primary malicious IOC is the redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=microsoft+office+2016+pro+plus+activator.+rar
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/b48b60_75e776382d3d44d98df15f9a3d1bd967.pdf
    • https://static.usrfiles.com/ugd/93971e_add211bc01da43cebe9d624b91396c97.pdf
    • https://cdn.shopify.com/s/files/1/0447/6780/5591/files/botupebinol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/76441883455.pdf
    • https://static.usrfiles.com/ugd/6f7357_38dfb99960894bb78092f7cc6c7394f6.pdf
    • https://static.usrfiles.com/ugd/f459ea_1b02743517f64d3a9709c9ee164e3533.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d71394db514285b0e877aaeb746780.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb47b5f1d4014dbdb96ac6e2fda0fb45.pdf
    • https://static.usrfiles.com/ugd/2d797c_fec76290e2994e6898656caf996c02a5.pdf
    • https://static.usrfiles.com/ugd/81d6a4_38b4d4c9fb4846d5b43fe58b3106d68e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005504.bin
e29d3006ab2a134663cb15deaed1acf4153534a7de1a4bf08da04f5cce8742fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5504 5584 bytes
font_01_sfnt_off00006825.bin
75061e5012b2502d61dc0f8b0305fc473bb6f0b6fbaaedea29ad264feec4aa4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 12904 bytes
font_02_sfnt_off00008c83.bin
56921cb1a9e5fcd9ea48364612f4245f3ff57b3697274efd71c95d5258cd4fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 10216 bytes

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