Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb5b459a564d953…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 07:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e84dc82eec398533b56e53542e94857 SHA-1: f2971dbfaf5a7bba2051ae371df2613478cc1767 SHA-256: 7cb5b459a564d953d578e20f2211c80c8fa3241f377b0657dee7f1363878c8e3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO manipulation. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity. No scripts were extracted from this sample.

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.club/wix?keyword=arbol+de+problemas+y+soluciones+sobr
    • https://static.usrfiles.com/ugd/de60da_e73b88f708574c3aa275ab705503826c.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_2b0a18e63eb04d789648d743f0e61287.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8f7d119cd7a4af69d3d0cf4b5e29ad9.pdf
    • https://static.usrfiles.com/ugd/9edd50_cb57e550275e4a46bc6609087ed92fad.pdf
    • https://static.usrfiles.com/ugd/c12414_b831552268ea4a129eb6988074f745ef.pdf
    • https://static.usrfiles.com/ugd/4cf28d_20efc284b7cb4e5e94ea4289abb4fde0.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/vozowotekobonuxosoredasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/luwujifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/dosebazedekusa.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3d5e3a0877e542a3b52cb21d5b251f4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1194370f7fe24c9aae7dbc812492f2fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_48f77f2cf4a64f738f36d47e914ca929.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba25675338d446c28dc32b150b01e924.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_off00005b6b.bin
9ed8f61e704920ae39557b73641d104d9425ab20dc9741c57fa5c63c2d835dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5452 bytes
font_01_sfnt_off00006dda.bin
d18655a8a35281c9a85de53c8969ee4eded6ded5317c84c8905da8296a65f556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 11388 bytes

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