Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64b1e024a360235…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 11:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e24de24264d12fbbe61cb37167b71c SHA-1: 72cba08812a57b503a1b756f964b7a1d103dff92 SHA-256: b64b1e024a360235bb365677abb92e317c0c4992f6c2cf8386f422e5b71f1cdf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being to 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=email+providers+free', suggesting a lure to a malicious site.

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=email+providers+free
    • http://files.adultlearningarch.com/uploads/1/3/1/3/131380138/02a00372e7.pdf
    • http://files.benjaminstars.com/uploads/1/3/1/3/131382274/monota.pdf
    • http://files.biot-global.com/uploads/1/3/1/4/131453902/c8bde462b221.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/zanawesubibinagokunafuvib.pdf
    • https://cdn.shopify.com/s/files/1/0437/6310/5953/files/touch_me_samantha_fox_album.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/kapojajilolezugidodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/intermediate_accounting_15th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/8650371914.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/88608942434.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/1998_jeep_wrangler_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/30274757257.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/xesegodezazuguxebowirubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/niwasazetakakifutabuwore.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/60264851655.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_off000065b4.bin
38df1f6c056467ab3b1f2bf67c8685d65ab39ed571d032046ce4b3fb21974a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 5204 bytes
font_01_sfnt_off00007756.bin
ee58918c8516be3c8cebafbffd17a3b1e10b8dafca504fde13177b7d5dad6715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 10628 bytes

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