Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac76e7edbec402ea…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 07:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fc0af83fbb12bff979ed76769287db5 SHA-1: 6c018abad2b36cf8f77ec7db0359a778fa08cbdb SHA-256: ac76e7edbec402ea160f658b7988de6b9f790d7b5a3a8b2056562d08460f2b6b
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.link/wix?keyword=netters+essential+physiology. The document body, though heavily obfuscated, contains references to educational material, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection attempt.

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=netters+essential+physiology
    • https://static.usrfiles.com/ugd/b28561_f240429cdc324baba8588052eacc3cd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_994f233a8f7142e2aa9eb3e797c90b38.pdf
    • https://static.usrfiles.com/ugd/b8c837_e261fc6a85604b87890c33fb52107b63.pdf
    • https://static.usrfiles.com/ugd/b8c837_1467a39025ce4bce8b4f3f68e8e28027.pdf
    • https://static.usrfiles.com/ugd/cc03df_227c7efc6b084c1394a5ba43db12edbe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/62188925169.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f31b2a80a054df8908eca6fa25b7a16.pdf
    • https://static.usrfiles.com/ugd/735189_e598c2dba6144545b23dd3ef55df27f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6ad5c6885594950ac3b8735acf93018.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/3204716657.pdf
    • https://cdn.shopify.com/s/files/1/0441/0349/9928/files/free_2nd_grade_alphabetical_order_worksheets.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_off00006183.bin
4235802face75d1e3dffbcc6a53424f9ee35be0d48fe8d9f1e5046e3105d1121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5152 bytes
font_01_sfnt_off0000730e.bin
9d6b5a26492266ec128d46f2b45573ca66d1d7c5322f818982a115901193a2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10492 bytes
font_02_sfnt_off000096fb.bin
7f768ca11fcfc9b6522a79bc5aead0f72c364649a2351afcbc76e5eea0a2d6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FB 16060 bytes

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