Malicious PDF — malware analysis report

Static analysis result for SHA-256 d118d463f4844d43…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 13:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81f4065128d2c716eaabddc0e69b6cb1 SHA-1: f0d898a981cf397072b2b595dcddbce2ee957bd8 SHA-256: d118d463f4844d43d62847a4c1afff29b3ac93782d835de44cc998e5a14a3b7b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=brandeis+brief+pdf'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'https://cdn.shopify.com/s/files/1/0428/6893/2767/files/neuroblastoma_tratamiento.pdf'. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious content.

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.com/pify?keyword=brandeis+brief+pdf
    • http://files.nymiag.co.za/uploads/1/3/1/3/131379875/4879326.pdf
    • http://files.tamarindcopywriting.com/uploads/1/3/2/6/132680789/48f63.pdf
    • http://files.kenkodoclinic.com/uploads/1/3/2/7/132740439/gamafi-dumejejok.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/neuroblastoma_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/sukajuze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/rotevutolonisoke.pdf
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/xutilidufosinate.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/75953934140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/emarketer_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/62449875372.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/rekesufutipumapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/minecraft_se_binary_not_responding.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/nopasemanotetufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/80263636833.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/osrs_the_slug_menace.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_off00006dd4.bin
6a12ac9e22a4b177ee1858ddced3e3ba6e30f5e4f2a7166ff036b4230982c52d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 5192 bytes
font_01_sfnt_off00007f7e.bin
24bafdd7d1b5af807096f2a9a3a5e17c99b72642f36e7c5ce0c65b9fd9eed4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 9940 bytes

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