Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d07d4f9b07416fe…

MALICIOUS

PDF

62.1 KB Created: 2020-08-30 01:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a88e613c3d2e4aacb4195cb86a518cd0 SHA-1: 9ef0503d565d8609e3264a20672ea8f5d0504385 SHA-256: 8d07d4f9b07416fe7f024971b27fddf032cffbdb8be499a2278c2aa6ed9b7966
150 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, specifically pointing to 'https://ttraff.ru/wix?keyword=mikro+program%25C4%25B1+indir'. The document body, though heavily obfuscated, contains text fragments that appear to be a lure for downloading a program. The presence of a link farm heuristic further suggests an attempt to distribute malicious content or traffic. The ML classifier strongly indicates maliciousness.

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.ru/wix?keyword=mikro+program%25C4%25B1+indir
    • https://static.usrfiles.com/ugd/b8c837_f1af2c8f66e54d9ba9709ab0571ad208.pdf
    • https://static.usrfiles.com/ugd/3f80ec_8b87da85e1b94d1a88b9b51fc02895c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26ee052378b49ab8788594b0c1bd47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea4791ef89ca4ce79789d26a538d9868.pdf
    • https://cdn.shopify.com/s/files/1/0438/8359/3883/files/55236048855.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/suxafakabovope.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/brachytherapy_journal_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/no_remorse_no_surrender.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/scatter_plot_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/company_profile_adhi_karya.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_off0000b00d.bin
d77d9e70be3a454b206623a5d180421df8c772702c7f6b9fb8810332c6a9059b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB00D 5172 bytes
font_01_sfnt_off0000c19a.bin
116e1a803a9566332b1d89575f62ff15e2b2f23789c98bbdf8615425ab1f2726		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19A 12980 bytes

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