Malicious PDF — malware analysis report

Static analysis result for SHA-256 8537a930cc7bcb1e…

MALICIOUS

PDF

112.2 KB Created: 2020-08-21 12:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5b4d3a582f567122568275a910958b7 SHA-1: 755a96417d715772dfc7c937b7fe88d9e9faae32 SHA-256: 8537a930cc7bcb1e773fc0ce5ea22a5a3f743f870694a417e46db69210623c67
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=world+happiness+report+2019+cnn'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The PDF also exhibits characteristics of a link farm, suggesting it's part of a larger SEO poisoning or spam campaign.

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=world+happiness+report+2019+cnn
    • http://files.strausorganizingsolutions.com/uploads/1/3/2/8/132815118/a78ee0ef2b711f9.pdf
    • http://files.jennifergelber.com/uploads/1/3/0/8/130813373/7007208.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/37199318465.pdf
    • https://cdn.shopify.com/s/files/1/0440/2233/3605/files/lodiwomixuzetilolunonuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/dopipewoxobesoti.pdf
    • https://cdn.shopify.com/s/files/1/0449/1522/8839/files/adolphe_appia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/sinep.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/joindre_des_gratuitement.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/mbr_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/61789820837.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/bomivikegivobed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/binary_tree_implementation_in_java.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_off00016d7d.bin
1e35baa2460e2a04389ec3bb5afe2a3c651248451896f8926582e5b758750f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7D 5656 bytes
font_01_sfnt_off000180cc.bin
540a18c90b89488c86382dc74cf8592442f09ad80254b71adcd3fdcc1431a536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180CC 16560 bytes

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