Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e430ad3e608e8d…

MALICIOUS

PDF

39.0 KB Created: 2020-07-31 13:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6949699406c34878f5542565d75d246c SHA-1: 9114ec2f1f3f84dd6b37ab67a73386b8cc85be9d SHA-256: f2e430ad3e608e8d0bcc1d6c4f817080269852fd4eb43fecc6162517a26bae29
120 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, which is also present in the document body as a lure for a 'free download'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=the+blue+book+of+grammar+and+punctuation+free+download+pdf, which is used to redirect users to potentially harmful content.

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=the+blue+book+of+grammar+and+punctuation+free+download+pdf
    • http://files.flockofbirdsmosaics.org/uploads/1/3/0/9/130969356/vatalogowu_zogidinu_pabugepedif_libuvuzozexesat.pdf
    • http://files.c3huu.org/uploads/1/3/2/8/132814097/gijener.pdf
    • http://files.clearlakestatepark.org/uploads/1/3/1/4/131452942/kozavefet.pdf
    • http://files.1320am.com/uploads/1/3/0/8/130814666/7264356.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/bovibusovinadidadupokox.pdf
    • https://cdn.shopify.com/s/files/1/0439/6505/5134/files/nefodavize.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/45914399196.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/40776244867.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/18131870471.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/41161635787.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/8577007889.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5765/files/lutug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/83384281681.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/jafevixuzovixuwobovosud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/losazodemoxit.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_off0000599c.bin
914a4447bd85083e92f39fa39e6d3f9770b981a42ad9e7a6d21f17134a2f0866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599C 5520 bytes
font_01_sfnt_off00006c48.bin
1234a2e28dccf0e6ff4eb377f92296ae5d13307ef8972adc64c40c152a9d1b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C48 9992 bytes

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