Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9731609c7e3955…

MALICIOUS

PDF

68.1 KB Created: 2020-07-27 02:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e627fdaca1d8b30ee1b9df2762cdd81 SHA-1: 437c6cd49a3c79d7e45b26bbbb0a790caba52036 SHA-256: ac9731609c7e39551b7cd8d0b4b4cdd7a0d419ce484c94d70e637b5a566f776b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to Shopify domains hosting other PDFs. This is indicative of a link farm or SEO poisoning tactic. Crucially, one of the primary links, 'https://ttraff.com/pify?keyword=by+formic+acid', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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=by+formic+acid
    • http://files.stmarysbrollagh.com/uploads/1/3/0/8/130874495/vadidek.pdf
    • http://files.shanghaivoiceover.com/uploads/1/3/1/4/131453821/6028159.pdf
    • http://files.sterconwalds.org.uk/uploads/1/3/1/4/131453291/1332249.pdf
    • http://files.elpasoalfalfa.org/uploads/1/3/2/7/132741064/97929961aa5.pdf
    • http://files.kzooathleticwellness.com/uploads/1/3/2/3/132303353/zamuxoxup.pdf
    • http://files.kzooathleticwellness.com/uploads/1/3/2/3/132303353/zamuxoxup.pd
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/5291440176.pdf
    • https://cdn.shopify.com/s/files/1/0433/9308/9692/files/ludunelikizel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/gunozupipoxawunejafix.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/zexobepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/52178456291.pdf
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/vapedomafinav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/sikutagifiruxajibubagitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/63029798471.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/zumatowubixesasapono.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5404/files/tituxokegago.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/85642574114.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/41324335158.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3de.bin
d2077f5d6d5b1d677d9b6d000eb087611a047961d42ceeb980acba3b54af8b85
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DE 6492 bytes
font_01_sfnt_off0000c413.bin
edc5067f7faf23b170736f3e0565cc1c5ade7898ca3e9a9aec94966fff951cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC413 4592 bytes
font_02_sfnt_off0000d3a4.bin
04e0ff014c274e71884c3ad76f91b3e38e36c165db389ac30b5c8b6513a8f64c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 14392 bytes