Malicious PDF — malware analysis report

Static analysis result for SHA-256 517a21ac713a0aed…

MALICIOUS

PDF

42.8 KB Created: 2020-08-01 23:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5126e75b6c7b210d00e08167ea8c4e88 SHA-1: 4a0f94cd192cd5c172e16a62754e4677d287099f SHA-256: 517a21ac713a0aed0718b46757fe81ca5e38d0d0e77cb48eee62f19326042ac0
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=frankenstein+study+guide+answer'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a coordinated effort to distribute content through multiple external resources. The primary intent appears to be directing users to the malicious redirector.

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.com/pify?keyword=frankenstein+study+guide+answer
    • http://files.istvanocztos.com/uploads/1/3/1/8/131856907/wawat.pdf
    • http://files.cynthiawidawski.com/uploads/1/3/1/3/131383247/fubit.pdf
    • http://files.steffiandalex.com/uploads/1/3/2/6/132682685/1573947.pdf
    • http://files.crossroadsareabirthclasses.com/uploads/1/3/0/8/130813301/manetob.pdf
    • http://files.jessicaesalvatore.com/uploads/1/3/1/3/131398532/924e62d9372.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/85708235851.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/nipixako.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/gipow.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/81881021942.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/puzunebukunebutiwikekom.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/vobivevojibamakugugag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/4721300467.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/61841628092.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/75244100293.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/97168083256.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/gejokitaxug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/jufuvebibowimivososunamox.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/fefurokimowabixup.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_off00006a50.bin
9169042c1a6cd4e32f3fec18a21c35adf9f187a7eafb4ecd3d0a461f73985767
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A50 5176 bytes
font_01_sfnt_off00007c14.bin
1fa5ed58e3163a71ebfb8b9f9b8bd9d91669264e5ab60b80a10fce3e23ecbfa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C14 10044 bytes