Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e0c79b22e9a0ad…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 03:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf5908a00c34cafd9298683f9496bcb SHA-1: 736a3c147d75ee722d2071e7ff19466f74dbf6df SHA-256: 95e0c79b22e9a0adc85e375e57ed70304ad97bc21b2d2545f104a943c019f546
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 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Google classroom training pdf'. The PDF also contains a link farm heuristic, indicating a large number of external links, with the first being to a Shopify domain. The primary malicious IOC is the redirector URL, which is likely used to funnel victims 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.cc/pify?keyword=google+classroom+training+pdf
    • http://files.myyearofhandmedowns.com/uploads/1/3/1/4/131454345/rebebad.pdf
    • http://files.teachus2paint.com/uploads/1/3/1/4/131453990/2186508.pdf
    • http://files.demsofnorthmeck.org/uploads/1/3/0/8/130813768/rutibuzabilapeb-mikewezebalewo-podab-rasimaxevud.pdf
    • http://jakod.helentclark.org/uploads/1/3/1/0/131069934/5549259.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/27760551940.pdf
    • https://cdn.shopify.com/s/files/1/0431/5126/1853/files/pipala.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/85829618750.pdf
    • https://cdn.shopify.com/s/files/1/0447/2363/4330/files/finite_automata_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/6572/0486/files/nejelanovuwixarokadela.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/79498129199.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/kisatajoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/janexifugatol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/documentary_synopsis_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/breeam_nc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4679/files/boundaries_cloud_townsend_download.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_off00006d6e.bin
e8e920a63180955498d7b9c378e16dfbba7e14caf0eedcc5b2fb91c0ce2f3010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 5508 bytes
font_01_sfnt_off0000800f.bin
c2e7eb89dddcb5b15242b91bbc566a38810c4b9907902cd9487191a371694796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800F 10092 bytes

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