Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf5189e263f2564…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 15:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d93acf8d1163046fa638c6e18a73a41 SHA-1: 4d023992184e237a75ca27ae4597e58743c61706 SHA-256: fdf5189e263f256424f3c5631436b9fde10590d151e32268ca1c1378abfb4649
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, suggesting an attempt to distribute content via multiple links. The presence of a 'download button' lure further supports the malicious intent. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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.com/wix?keyword=multiplication+worksheets+for+7+year+olds
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/39960441386.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/7441985784.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/tilifovoxijusifuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/guvagutixojebomosenara.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/el_poder_de_cambiarlo_todo.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
    • https://static.usrfiles.com/ugd/daca0d_deef459799de4f43b4c899efd44fffed.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbf32c67fcd438ebdac23d0626f80df.pdf
    • https://static.usrfiles.com/ugd/fa6f14_1d8e17aefc624c95bc9f1970de42e8ff.pdf
    • https://static.usrfiles.com/ugd/48f461_32ce87b4a4a54832b9ea1adb5b5c72ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_df685358f3244444b989f5a7620b5a96.pdf
    • https://static.usrfiles.com/ugd/b8c837_a054bf630dbb487b9970bd36e6cc5104.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_off000061f5.bin
6359d5954e7abc12c84047bd32a6d765d7f37b26bd80d9ff6e5f1bcdd8d139e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5468 bytes
font_01_sfnt_off000074aa.bin
2bd2b0a205ae50fd266d13db25b6a990cc949b9fb8ec55641465dd181dd92f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AA 10072 bytes
font_02_sfnt_off00009710.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9710 4324 bytes

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