Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01a69ff81a0c1a4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 19:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029965ec0f1f3244ce426b9e7d392c42 SHA-1: eba15ab7a5a39cebdc20bae0c5c50f95c61c62ab SHA-256: e01a69ff81a0c1a41a63a347c0b6a9198b71e5894783efe302c676914e08e5b5
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to benign content, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to disguise malicious intent. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of outbound links, typical of SEO poisoning or link farm abuse to drive traffic to malicious sites.

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.cc/wix?keyword=fda+21+cfr+part+11+pdf
    • https://static.usrfiles.com/ugd/b8c837_59435c987f8843dbb520fb792944f9ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_8614395f95f14a9492019aaa4f76754e.pdf
    • https://static.usrfiles.com/ugd/22739b_3400e9e99d99495188e5b58a9be9c3b8.pdf
    • https://static.usrfiles.com/ugd/345929_6945cb15ad0246bd900f3da659e61f82.pdf
    • https://static.usrfiles.com/ugd/6c032c_e2c563a3aad44cb7a1c90c8c3787aa65.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/azar_basic_english_grammar_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/spread_spectrum_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://static.usrfiles.com/ugd/4bb894_3909a1091a2d4703997eedfae65ecac4.pdf
    • https://static.usrfiles.com/ugd/b8c837_df1eccf167f74f62aa404de7dda292d6.pdf
    • https://static.usrfiles.com/ugd/e32576_7dfd612fae5341dab62b6a0cfd25d5be.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf0379e7f31b422aa60769b3024e833a.pdf
    • https://static.usrfiles.com/ugd/23e9be_3eae9b78e9224cd599305ca20d9e369d.pdf
    • https://static.usrfiles.com/ugd/ce14f3_05905b6d57ab47e4b0b25f383417e727.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_off00006d32.bin
a38d1cca47de05d6eab31edf8cc4224c9938cad71f7536955f271ebed283b701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 5080 bytes
font_01_sfnt_off00007e99.bin
e617b2b63b9f3b605b4a91b19ed485235d600ece1830a625b07de762c56b902a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E99 10820 bytes

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