Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1aecb2e3168fbd…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 18:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b8788c21e0aa17f3b1db0b773efd4a SHA-1: 673c76a1eae7d21c5b3f95391ed73bc47cd381c6 SHA-256: 3e1aecb2e3168fbd829346e6600199b24d0220e7c4dd1e140022b03068e491af
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as 'adverbs worksheets pdf with answers'. This link, however, redirects to a known malicious URL (ttraff.cc), indicating a phishing or redirection attempt. The PDF also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse to mask malicious activity. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=adverbs+worksheets+pdf+with+answers
    • http://gixoli.tylermany.com/uploads/1/3/1/6/131637814/5100674.pdf
    • http://wojobik.myjuicemonkey.com/uploads/1/3/0/8/130813528/soporenumupe.pdf
    • http://files.sheltonford11.com/uploads/1/3/1/0/131071063/5533558.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/55123333467.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/rumufawobasulufatogofuxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/evolution_of_human_brain.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/jakanukogibiwuvomogifig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/18563911004.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/xobap.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/dufekeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/zaxepakuwopamufumebizam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/xanuvojifugikezuvizifo.pdf
    • https://cdn.shopify.com/s/files/1/0445/3974/0319/files/biochemistry_lehninger_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/5206300723.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/90428639403.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_off00005fd6.bin
0b562b799577e6879b6fe45151e7a0c25801bc318f6b958fff7a713803d1a6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 5440 bytes
font_01_sfnt_off0000725e.bin
09054b41c58a433bde1eb87f04592a7ebd7236b300641b1910c52a6af3e34a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 10072 bytes

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