Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e62265158963d2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 23:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aafc22910666a2a542f9b26a5b6c6d31 SHA-1: 98bd4e9aa6fb1162307445e95d14d982586d7eb4 SHA-256: a4e62265158963d25e07dadc2a4832ee302bff4b28e19072eaa62b653814dca9
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/wix?keyword=co3+2+polarity, which likely serves as a redirector to further malicious content. The document body is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=co3+2+polarity
    • https://static.usrfiles.com/ugd/8acad3_70dcef71d1c344c59e11b4ce899f348c.pdf
    • https://static.usrfiles.com/ugd/defdb4_6e969cf71ab1429ca92436c2f31a3732.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb48b2bb6e89477e84b4f4b180b3be05.pdf
    • https://static.usrfiles.com/ugd/5360f8_577115e00ded48379b3d8aa1c2d372da.pdf
    • https://static.usrfiles.com/ugd/b8c837_61dc039615f94bcd81525e48d6b394d8.pdf
    • https://static.usrfiles.com/ugd/76156b_691b67ec25504ee48c9cb0ed3e0a5e18.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d89722f75f483983a8e7d72e5640f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/c5d40f_be28da6daa25498ea54d5bd623ef89ca.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/gran_canaria_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/88666316097.pdf
    • https://static.usrfiles.com/ugd/2ac701_5fcb7c919a26453dab1c718fe9bf750c.pdf
    • https://static.usrfiles.com/ugd/5ad03d_e7690253170745c09cc66e42648bf0a9.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_off000066d6.bin
309a1533709c3a25099e7d3017ec5c25f28ad74da93da2b87117560171d60f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 4940 bytes
font_01_sfnt_off000077b7.bin
13623bb9060e9216820b9da6973c427386688ec510d6df090e527cf53cc56a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 10520 bytes

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