Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc0aa51c20d02f5…

MALICIOUS

PDF

426.1 KB Created: 2020-08-09 03:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea0a1b3943df9652d94501221920b60 SHA-1: f56d7a72af3598e168681f1a3471ba170d5a0763 SHA-256: fdc0aa51c20d02f5ed905ab6dad9531fe8b099bcb5743e6bab0dcffbe84b3666
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ata+hypothyroidism+guidelines+2020+pdf'. The document body, though heavily obfuscated, appears to contain this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 2

  • 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.
  • 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.ru/pify?keyword=ata+hypothyroidism+guidelines+2020+pdf
    • http://files.mrncrdbl.com/uploads/1/3/0/7/130739379/7756764.pdf
    • http://gafel.churchofsaintmarks.org/uploads/1/3/1/4/131453278/4491069.pdf
    • http://files.compoundincome.org/uploads/1/3/0/7/130738771/pufejubarulaz.pdf
    • http://files.ssvfcpc.org/uploads/1/3/0/8/130813146/7d7adf6f11f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/69493967970.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/bekisenolewizuroru.pdf
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/negaturuworokoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/curso_de_ingles_para_nios_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/9854835250.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/81401343574.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/53544815834.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/lesof.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/gorudapukujaliwifesamo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00063866.bin
cdc945ecb03c99939e65fb1403bb53d81149115a8853d173167309bd63fe09bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63866 5820 bytes
font_01_sfnt_off00064c1d.bin
95f182d2019d2f36318ecce4087b6d39efc5b4c32a5f06612f95b7c6da51790b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1D 17812 bytes
font_02_sfnt_off00068285.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68285 16148 bytes

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