Malicious PDF — malware analysis report

Static analysis result for SHA-256 85782e8038c43da2…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 04:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9357adcb61774d3e552fe8aad45e6866 SHA-1: 2f3cf02203161cb7f4ed54fee3d6b72303eedc74 SHA-256: 85782e8038c43da2f23c917ffe60cff80521c0d3dea100a4ebc054e86fe15c09
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and potentially malicious redirection. One of the primary links, 'https://ttraff.com/wix?keyword=experimento+del+huevo+en+la+botella', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to drive traffic to this malicious site.

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=experimento+del+huevo+en+la+botella
    • https://static.usrfiles.com/ugd/b8c837_3aa86016fcb14e05ae366fc6f2b5ad76.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7c4b5b4d9046ca9ef19843cf3001c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_29124ebfb1394f6890e91d97662791a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3de7cee158594bb4a84d59cdef87c45d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dc361af2a83430a8539f059207bd5e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d92dd37c3518400786591cc6da3b1405.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59f6c0eb37742cda4586de8e5ae4a8a.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/mewekewedavalikupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6920/0791/files/resedanagegevuremuxemev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/c_round_up.pdf
    • https://static.usrfiles.com/ugd/b8c837_da597b5dc8d14027ba045ec08f63c16b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ac67685347c418a8d01357a5a585f4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c881a4cdd3a48caac3f3699895b18b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1a4742eb5d045ea850a6c93b6a45d7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2db2002e193248a18b424bbcb42f1051.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_off00005ffe.bin
a9c411ebc325c4f6a7714b9684a5cd7d7630320e92df7e744b1a509f953ecfe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 5248 bytes
font_01_sfnt_off000071ab.bin
035d3e421f246d0a35b1b9b276f8d9910b5cbdc0d6a666ca626b56a93904a869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10916 bytes

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