Malicious PDF — malware analysis report

Static analysis result for SHA-256 e713b4e560a0307a…

MALICIOUS

PDF

38.5 KB Created: 2020-09-06 17:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60769e5f1fa8819e50d57defc9bb1cb SHA-1: e89453871b83824d2e3d18e716db74a08518b3d0 SHA-256: e713b4e560a0307a27930844836d1a4d68792484fea9a611a9d404007bc02cc1
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to a known malicious domain. Additionally, it contains a link farm with numerous external PDF links, many hosted on Shopify. The embedded URL points to a redirector that uses a keyword search, suggesting a lure for potentially malicious content. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a social engineering attack aimed at directing users to harmful sites.

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.club/wix?keyword=bahubali+tamil+movie+songs++masstamilan
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/8526239854.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/nitadotez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/nuvibo.pdf
    • https://static.usrfiles.com/ugd/99afdc_0150ced1e13e4b35b2765af6db2388e7.pdf
    • https://static.usrfiles.com/ugd/cfa91a_184723f36cd34eb688a79eb5664c5706.pdf
    • https://static.usrfiles.com/ugd/73cb9e_e29a390c39674c21b204b44e465a6769.pdf
    • https://static.usrfiles.com/ugd/0582e0_25c09985e35c41c89f74df5d03c97d7a.pdf
    • https://static.usrfiles.com/ugd/3e9e83_c9fb330575894e97be11fd157278ca07.pdf
    • https://static.usrfiles.com/ugd/83e584_43ad92b22d4840b9835a76931cc76251.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_off00004edc.bin
2cda5e40fe570cf928d5ee9e80120c3475e09d41995f3ffd2202653b92b50901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDC 5252 bytes
font_01_sfnt_off000060a1.bin
a5bc4686c7f4c1b32748d43767c6a86bbe2b3be0db92ad03dc42b301780441cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 14496 bytes

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