Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a9150091ff0844…

MALICIOUS

PDF

42.3 KB Created: 2020-09-10 13:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794ef77d1bc32844a69aea7ce6e28b38 SHA-1: efca0537df8056379ab4459a452eb393c8b318b4 SHA-256: a6a9150091ff0844e013008284daad8ec7cdc12aa7f50273d308b20e60719e6d
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to redirector infrastructure. One prominent link, 'https://ttraff.me/wix?keyword=airedale+academy+performing+arts', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a link farm or redirection scheme designed to lead users to malicious content. The presence of multiple PDF links and a malicious redirector strongly indicates a phishing or malware distribution attempt.

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.me/wix?keyword=airedale+academy+performing+arts
    • http://files.vietnamunitedfc.org/uploads/1/3/0/7/130775952/9168876.pdf
    • http://files.hardershawaii.com/uploads/1/3/1/4/131438228/2251672.pdf
    • http://files.candace-makeup.com/uploads/1/3/0/9/130969616/b74235.pdf
    • http://zexejebu.wesallenmedia.com/uploads/1/3/1/4/131437601/bokolufa_xuvebule_veponif.pdf
    • http://files.globalreg.info/uploads/1/3/0/8/130814085/9e89a56b27d41.pdf
    • http://files.vibeljewelrystore.com/uploads/1/3/0/7/130776451/1389368.pdf
    • https://static.usrfiles.com/ugd/61f964_47cfe051d9bb4adf93e29f7750d4503a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1526747ca75a40349b438c9bd8466d4b.pdf
    • https://static.usrfiles.com/ugd/ea2c45_850d22e94df343e0bba524be0d11a18d.pdf
    • https://static.usrfiles.com/ugd/5438e3_325a8bbbe8634f168b927cc0a147210d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/jefedefaxadeleb.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/pujalun.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_off00006539.bin
acea37f508b23d55a8517ec8768bf61c6f991556a9339e04d9b77a9abad10e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5564 bytes
font_01_sfnt_off0000781d.bin
a00d6141b8b4ed5d8f58a00e0953473db21a81489b50e5e21b1debcfae417dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 10608 bytes

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