Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9abb1f780392b1f…

MALICIOUS

PDF

64.1 KB Created: 2020-08-29 01:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae75dddb4b5cc3668b2d906c31c11db4 SHA-1: 367be22781f7d4c3a9922df79454d8ccba586e32 SHA-256: d9abb1f780392b1f19628031a32acd58e6790fbb6abffa99108cdaf299a9b3b2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=togaq+in+these+words'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to other PDF documents, with the first identified link being 'https://static.usrfiles.com/ugd/b8c837_f9a76637d0b0456eb2d7cc0d08568385.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the text 'Togaq in these words' and the malicious URL, suggesting a lure to external content.

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=togaq+in+these+words
    • https://static.usrfiles.com/ugd/b8c837_f9a76637d0b0456eb2d7cc0d08568385.pdf
    • https://static.usrfiles.com/ugd/b8c837_576b572585034db998e9fea34c285dc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dd82ebf56a74c928ccb333f79a8b452.pdf
    • https://static.usrfiles.com/ugd/b8c837_76758413ac8b4756a5640b3d42018e38.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fb2f9cbee6942548e2d36f1f208073c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/dafabuxilegowom.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/pujusutulesisojowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/81383181308.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/78799726553.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/vurifisoduzojimo.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4aa6b52ad8c4f63ba4bd253b9a4b068.pdf
    • https://static.usrfiles.com/ugd/b8c837_632b364a7a88422b98969ff5ccf9022e.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_off0000a99f.bin
8526750f68143c0e1fd4adb3f6aaf4fef9cbf7da41d691e6594a06f0b98a13be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA99F 5224 bytes
font_01_sfnt_off0000bb63.bin
0e89563a5411696202ef1870f385f96a529c2ab06ca7f167b41e261afd7f69db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB63 10288 bytes
font_02_sfnt_off0000ded0.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 16164 bytes

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