Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21c2b64ad47d596…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 03:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 920f275521a0e2b6049614546a609a80 SHA-1: 7110f621009bf57df820e5cf8676250eac68e815 SHA-256: b21c2b64ad47d59664fdf29f3069820ebb54d067f53d67bf97940e7979d24a51
120 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=international+t444e+engine+service+m'. Additionally, another critical heuristic indicates a PDF link farm, with multiple links hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.com/wix?keyword=international+t444e+engine+service+m
    • https://static.usrfiles.com/ugd/9a242c_82bc3baef9d34e76a731b19ced0b2dc1.pdf
    • https://static.usrfiles.com/ugd/05900a_3bfdb34efb1c4e4e99a32b1b63c8b70a.pdf
    • https://static.usrfiles.com/ugd/9ea91e_069923c1b8c04814a3a33f16e41bf59f.pdf
    • https://static.usrfiles.com/ugd/599f1c_7b22ef82ebdf49bba12f03e186568f90.pdf
    • https://static.usrfiles.com/ugd/834936_d53b088dbcb44d78aeb2f037b66c680c.pdf
    • https://static.usrfiles.com/ugd/764aaa_0946d3b54d274cf5a8d4313123664fa1.pdf
    • https://static.usrfiles.com/ugd/afe78f_607e83ee21b14c8ba626fa302cc1b1e9.pdf
    • https://static.usrfiles.com/ugd/cdb50c_139bf1c9cc674284aa061286b05d861e.pdf
    • https://static.usrfiles.com/ugd/b8c837_95a2de1656cb4c7db8a4ad7c9169c6ee.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gosifuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/fefud.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/gravity_form_css.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_off00005dc7.bin
114fd1844fbd8b0252baadf72be0b70966a93f6c7dc35b04c04f477ac9663a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 5204 bytes
font_01_sfnt_off00006f73.bin
7aed8fca2c8eba733754924740e3dbb0adf8e2ae18d9d89a70c3cbf4fd861e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 11244 bytes

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