Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35cf7e77d205620…

MALICIOUS

PDF

52.0 KB Created: 2020-08-30 02:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017e0efc2bb23c63573ec662cc682abd SHA-1: d39774283e66a98b71687794e7a6882265e19398 SHA-256: b35cf7e77d20562002f5d1ece582825109471da978e77cc18805f6f77dc926d1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=rx2c+datasheet+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to PDFs hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0428/2076/3804/files/nevibobaxativazuf.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking through to a potentially harmful site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=rx2c+datasheet+pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/nevibobaxativazuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2914/files/adobe_reader_download_offline.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/72455211728.pdf
    • https://cdn.shopify.com/s/files/1/0464/9202/5000/files/xozogimobidemidotixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/formal_gala_dress_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/24274194177.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/concierge_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/27482103638.pdf
    • https://static.usrfiles.com/ugd/c3f88d_d7bae65424dd4f0cbda99fd85afca0e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_165550fb41434e53b50c5e88d018a5fe.pdf
    • https://static.usrfiles.com/ugd/d162e3_9491335f36424c249c9858f7ba23ad66.pdf
    • https://static.usrfiles.com/ugd/913720_1ed9a49863b141e190090b2da80213f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c98e0e70f5b47a8b89258136dead7be.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/air_force_old_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/71772677055.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005389.bin
df6d5cdd60d6a9a0c6b4c2c743e525630d14f00048f4459fb65b34caaa13feee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5389 6464 bytes
font_01_sfnt_off000069df.bin
8ef73ece8100e875b312f16d14895cc317819823e108ce5ba77652229888dd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 4848 bytes
font_02_sfnt_off00007a66.bin
aaa68e79dcdb6902e52c2bd1a26cb444310054c376896c5f0e7c98de2e3ca557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A66 10396 bytes
font_03_sfnt_off00009daa.bin
1f8959b5ab28b400c2269d6ef0b40a308675922fdfdc979ddaa67e173e8db2f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAA 16168 bytes
font_04_sfnt_off0000b2c4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 4324 bytes

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