Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1d274386996418…

MALICIOUS

PDF

50.0 KB Created: 2020-08-27 17:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9119e7cab9bcdbcfb0ac44ab0b7e7a9e SHA-1: ac41e6aa6f672c24ade7d9a9b1082a0fd1e09363 SHA-256: dd1d274386996418ff73db603598c494accfc57c2b191365deb130faa9aa4b8f
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=memoirs+of+my+nervous+illness+pdf'. This indicates a likely phishing or malware delivery attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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/pify?keyword=memoirs+of+my+nervous+illness+pdf
    • http://files.devodiva.com/uploads/1/3/1/4/131406831/7385181.pdf
    • http://figudino.plasticfreegreece.com/uploads/1/3/0/7/130776021/mezug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/47086689737.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/wulogepejovexox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/gazemadewo.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/56601474531.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/27134349103.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/59626840539.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/3130956272.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1555/files/96419586984.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/alienist_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/after_effects_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/mainframe_assembler_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/download_free_ringtones_for_staying.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/
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/596268405

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a45.bin
95279464064d4cf3fda1c00612cf8e24210492eb4cdc8f17a85b2c4534f6fe2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 4944 bytes
font_01_sfnt_off00008b05.bin
6115efac8e8eff6c246faa8036ea0c4a753396eaeed2908ad57cea2dd6cf3066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B05 9908 bytes
font_02_sfnt_off0000acfa.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACFA 4324 bytes

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