Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb06df0737a53dd8…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 15:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f40692c6f8826d4815f1a5e2d4723b SHA-1: e242c1fbfc5fa244f219d3d9582b0e505e48667f SHA-256: cb06df0737a53dd8390df43ab27ccf8ab8992fbabf0a0bd65398d178ab8c5e05
130 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector, indicating an attempt to lead the user to harmful content. The primary malicious URL identified is https://ttraff.com/pify?keyword=exacerbation+copd+guidelines, which is a known redirector. The document body, though heavily obfuscated, contains references to the topic 'Exacerbation copd guidelines' and includes the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous external links, many hosted on shopify.com, further supports the link farm heuristic.

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.com/pify?keyword=exacerbation+copd+guidelines
    • http://pevoxupo.powellchurchofchrist.org/uploads/1/3/2/6/132682646/povipufol.pdf
    • http://fumoxi.theoldpostboxsuffolk.com/uploads/1/3/1/8/131871674/7521363.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/miwutatak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/balance_sheet_example_llp.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/miligazilo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/ct_trang_trong_min_ph.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7135/files/free_birth_chart_transit_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/pijevesikiduru.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/linux_administration_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/85795632036.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/66333239456.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_off00006b55.bin
e7afefb01d918d8e64e1e7c24c9d59d72f04c2631535893fa3ff8287fac38527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 5408 bytes
font_01_sfnt_off00007dbb.bin
193d489b7e5881ad0ed299f5af64cf30ede47bba796d0c3af662d8a51490161b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 10764 bytes

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