Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b7aff8a8855d7a…

MALICIOUS

PDF

45.0 KB Created: 2020-07-22 01:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada130cc465fb605cddab79d6abf7034 SHA-1: 6f3e529275c60be9048e70a3f2c75523b7040b04 SHA-256: e3b7aff8a8855d7aebf1e93347dcbe8c539fe740f325d66a62b49ae08c3ae6b5
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.com/wb?keyword=hydraulic%20system%20aircraft%20pdf`. The document body, though heavily obfuscated, contains keywords related to the embedded links, suggesting a lure to trick users into visiting these sites. The ML classifier also strongly flagged this PDF as malicious.

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.com/wb?keyword=hydraulic%20system%20aircraft%20pdf
    • http://files.jamonit.org/uploads/1/3/0/8/130874237/236038.pdf
    • http://files.mccoysactionkarate.com/uploads/1/3/1/6/131637919/tameb.pdf
    • http://files.catsservices.org/uploads/1/3/0/8/130814110/290cedaee.pdf
    • http://files.orchardmemorials.co.uk/uploads/1/3/1/8/131871786/2991666.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/zumol.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/22299089992.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/15557515170.pdf
    • https://tudavolo.files.wordpress.com/2020/06/fetiresujifoxixuxupizi.pdf
    • https://bogosakodulo.files.wordpress.com/2020/06/ledukezubukuvamusur.pdf
    • https://motifomimiwa.files.wordpress.com/2020/07/89863719680.pdf
    • https://tapizukode.files.wordpress.com/2020/07/32152474063.pdf
    • https://mobulozasa.files.wordpress.com/2020/06/wuvifefiso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/67623739810.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1476/files/judogot.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/27001577995.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/89034818760.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/95737875585.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/90271795951.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/38638463342.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/4147512915.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/
    • https://tudavolo.files.wordpress.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073e1.bin
6f0e47d817fb8248da639f3a946424cd27b75fc06a5f81b6a9a88d0244f5d081
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 5028 bytes
font_01_sfnt_off00008500.bin
ad09f01aca5813d92ff4d6d70956c253493323a89bb06852e3b78ef78ee46a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x8500 9844 bytes