Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c1c7144bf2c3d5…

MALICIOUS

PDF

134.6 KB Created: 2020-08-12 18:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e375fbde0069b7e3b86cb3641c13e643 SHA-1: 5ae05c744b38ea5aab3eab1d6fb11cc0649d23ed SHA-256: 90c1c7144bf2c3d5889d26318d561a7e22c803532b11430247a17ccb45d6e431
130 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is a known malicious domain. It also exhibits characteristics of a link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL. The combination of these factors strongly suggests a phishing or redirection attack designed to trick users into visiting a harmful site.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=desastre%20de%20brumadinho%20pdf
    • http://files.amydethick.com.au/uploads/1/3/0/7/130775260/9a654869700c92.pdf
    • http://mejinus.nutrismartworld.com/uploads/1/3/2/3/132302751/7978660.pdf
    • http://files.refugecl.org/uploads/1/3/1/4/131438211/kuxelarupaxanirigi.pdf
    • http://files.vanixo.net/uploads/1/3/2/7/132740553/5785663.pdf
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/66469386323.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/86943239026.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/33676087957.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/medicinal_plants_and_their_uses_in_tamil_language.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/25548263784.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/duxukagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/vuxirizet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/conjunctions_in_english_grammar_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/aaron_becker_journey.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/biblia_ortodoxa_vechiul_testament.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/69121410250.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/compound_nouns_worksheet.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_off0001d3a6.bin
f15e2002ec222fc2e5e907f36a66783455204de6f89e8d648a7bff718e2b3558
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3A6 5388 bytes
font_01_sfnt_off0001e5c4.bin
39ecd904e1dffffcd9371aa09033e09c2b74d949be5c328e8597b58f002f174f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5C4 11992 bytes