Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc072d4d89cebef5…

MALICIOUS

PDF

70.6 KB Created: 2020-08-05 23:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ca5c0fb788c444aa56d8d3b10651c27 SHA-1: fc7e641c220ede685a5b60fd0646c365446395ee SHA-256: fc072d4d89cebef51d05c3671686ba8a211a52877db5a3054f97299db4e5301c
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.com/pify?keyword=enigma+otiliei+pdf+scribd'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the lure. The ML classifier also strongly indicated 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.com/pify?keyword=enigma+otiliei+pdf+scribd
    • http://files.thompsonsteamer.com/uploads/1/3/2/6/132695569/motokonafanin.pdf
    • http://files.2018vote.us/uploads/1/3/1/6/131637150/jumujarujosudopakez.pdf
    • http://files.funthoughtsonlife.com/uploads/1/3/1/4/131483361/wazapoziwezowi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/vurodolirufevawurijusije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/global_offensive_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/73114316070.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/mastercool_mcp44_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/77062873713.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/29422462894.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/96284394033.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/commentary_bible.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_off0000ca00.bin
827ff1851e71cf4164dd1e8765d3a1a87a5e91819683cd1d1c4db83ff38e82cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA00 5360 bytes
font_01_sfnt_off0000dc19.bin
8caa9efa40ea8d152fc4fe60a3f78b75b911fb1ff72b9aa13fd46cfc150844cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 10240 bytes
font_02_sfnt_off0000ff30.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 4324 bytes

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