Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb70b2e4b4ff8f51…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 02:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3655f49c874cb7a721e2328d7c3eb1d SHA-1: c7029d9cddc24468b19d0daabb2475372d048d4f SHA-256: eb70b2e4b4ff8f516c9304e1613b6d848d9bbc7654cc4834b610d6fc7ae4da76
150 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector URL disguised as an activity sheet. The primary malicious URL, "https://ttraff.cc/wix?keyword=dilations+activity+sheet", is designed to redirect the user to potentially harmful content. The presence of numerous external PDF links, many hosted on static.usrfiles.com, indicates a link farm strategy to obscure the ultimate destination or to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=dilations+activity+sheet
    • https://static.usrfiles.com/ugd/b8c837_413166dd6e904ee78e3076911b2f31fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.pdf
    • https://static.usrfiles.com/ugd/b11f6d_0fd212d7fc444dd099e0b4e1d16ab295.pdf
    • https://static.usrfiles.com/ugd/a771bd_29843e12f3314a7982b09c117d2dcdc8.pdf
    • https://static.usrfiles.com/ugd/0aab01_ecea4c8cec414dd7af92e85e340713b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4673dce8f7542ca9b8e42640f6dcc40.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_60cb28ded06d4279bfc8cde845e481ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_1aeefc703f3041d080a57695c97e6b3b.pdf
    • https://static.usrfiles.com/ugd/6a7407_146589f8b4784b6fa7562910600141a9.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/32601826391.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/88614068551.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9932/files/jenimu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/82849818265.pdf
    • https://static.usrfiles.com/ugd/b8c837_34adb5eaa6b245c2b452b7330120860a.pdf
    • https://static.usrfiles.com/ugd/0adedf_ebe0b08524e7471199e901563fefb139.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca9457cc5666422eb9b1e19050ef0c05.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_off00005fa9.bin
8cf1cd25ec7690c132e1b64a745073cddc83fc5cd94ba4768f91e8794d0edcf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA9 4952 bytes
font_01_sfnt_off00007094.bin
9ffa01ce504ee52a65f14bd3fd89c6127cf1ef8a40b7742b4aa9fe823757570b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 10512 bytes

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