Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2b79a53d9b53e1…

MALICIOUS

PDF

43.5 KB Created: 2020-09-03 03:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 672edb25e5e01bc465f356ee60692d93 SHA-1: 9f691f55c1d69a9bcecd651c942159fafde9b60e SHA-256: cd2b79a53d9b53e1577f5835522e8da12ac24da75a3b9807707a70ded1865254
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '50th birthday party invitations templates' and includes the malicious URL, suggesting a lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=50th+birthday+party+invitations+templates
    • https://static.usrfiles.com/ugd/ade4e6_c04726078b5a42e3ba1578faca329a90.pdf
    • https://static.usrfiles.com/ugd/0aab01_5bb21bd1ade74b5caba7c580546fe6b6.pdf
    • https://static.usrfiles.com/ugd/7c3584_c8afe9844ccf4bf39e934b67169db145.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/88949328354.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/application_of_biotechnology_in_dairy_industry.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/agric_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/37517203016.pdf
    • https://static.usrfiles.com/ugd/fbccce_c50b8d5df86240a499266dc7b0fadc28.pdf
    • https://static.usrfiles.com/ugd/b8c837_35695968fed741b7abf77f63de221c93.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_off00006bbf.bin
4f7e95effecd4b6dadfbe31742a2c30b82e892c738c110ec1a3bb57dbbebba8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 5672 bytes
font_01_sfnt_off00007ee0.bin
000c2052415a6b4d4ba2b87da08b35b6e519a9bd3c4774872cbe588d088cad7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 10164 bytes

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