Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce842c37adfee3dd…

MALICIOUS

PDF

47.9 KB Created: 2020-08-20 06:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e51217ea3dbb51f23dbfcac43729227f SHA-1: 858a7dfc786b0999d38baae51920637b907482b0 SHA-256: ce842c37adfee3dd4ca0ec9e4cc21c07611bdbbbc99338004ed579e9e967760b
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Cubase 5 tutorial pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The primary attack vector is likely social engineering via a deceptive document.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=cubase+5+tutorial+pdf
    • http://files.hammeriefarm.com/uploads/1/3/0/7/130776131/jepurukidex-mazarimuju-kotebalevosataf.pdf
    • http://sotuzopa.mrsmacspage.com/uploads/1/3/0/7/130775169/2492057.pdf
    • http://files.catherinereilly.com/uploads/1/3/1/4/131483138/3803139.pdf
    • http://files.patriciasmom.com/uploads/1/3/1/3/131398187/ribuxudazir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/voxasikavomenisawuguju.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/70394088973.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/dimetoro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/tetugagemarilipalakit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/livetuwukidi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/paserilem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/68454573310.pdf
    • https://cdn.shopify.com/s/files/1/0452/3150/5565/files/geographic_tongue_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/tet_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/38129040644.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_off00007d70.bin
9dff6b4f16520470e51c2198ab5347a052c13e7ba2ab5dd01233dcb5acf8c08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 5204 bytes
font_01_sfnt_off00008f2a.bin
c145b47107e7f46c4292a8b11aa0890bd366dd091ddb32d875b7c64b81f74190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2A 10456 bytes

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