Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e2b98c666dfd6e…

MALICIOUS

PDF

50.0 KB Created: 2020-09-07 16:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e959af1c6c8c41b6657440b9cfcd41 SHA-1: b1c5126eb1184dd7a09bb677e9e5af738ff73a5c SHA-256: 53e2b98c666dfd6e424c14476990e452b953ed497ccac055796cbb89884461ec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that promises "delivering the goods mini ielts answers". This URL is likely the initial stage of a phishing or malware delivery campaign. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to Shopify domains, but the primary malicious indicator is the redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of 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.link/wix?keyword=delivering+the+goods+mini+ielts+answers
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/cyanescens_mushrooms_trip_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/tanezikanoverijen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/89064109013.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/manual_de_canceleria_de_aluminio.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/girugidoxokademisa.pdf
    • https://static.usrfiles.com/ugd/d2751c_97162e64e3df4cb582c1cc441d5b516c.pdf
    • https://static.usrfiles.com/ugd/289c5e_61413ae497c44579b6ff12014df93e55.pdf
    • https://static.usrfiles.com/ugd/041b56_d7e3ccac3c174c0fb4e1368a2da697eb.pdf
    • https://static.usrfiles.com/ugd/696b8a_75bdc280b7a54f429c464b0afe231b78.pdf
    • https://static.usrfiles.com/ugd/197ed4_41146ba847484117ab2d772f5853c8af.pdf
    • https://static.usrfiles.com/ugd/4f92c1_10dc444dd89e433c80479499e84a2e43.pdf
    • https://static.usrfiles.com/ugd/95ea6b_866d74efef6d4854b2d2c9b83a870f1f.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_off000085fd.bin
f5f651af0215042b3e0aebefcd0ad1a1da33550fea18df1864b9cd61ff0fcaf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 5392 bytes
font_01_sfnt_off0000983e.bin
a63c242a5a7885a9f97d3a8424aae14fd25b62062e68ee5e2f3ece47a49218b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 10272 bytes

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