Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2fd7dc05c81526…

MALICIOUS

PDF

41.3 KB Created: 2020-08-16 17:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7516a7d0bac2fb1ae26a508e1a6a2468 SHA-1: b1b244a1df370540b36f2158f02bda85e8ef487f SHA-256: 1c2fd7dc05c8152608da66707bf2bc2031a3842fcb45bc3aa1453632f0006d8e
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'daycare staff evaluation form sample' and a URL that appears to be a lure. The primary malicious URL is https://ttraff.cc/pify?keyword=daycare+staff+evaluation+form+sample, which redirects to other content. The presence of numerous PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=daycare+staff+evaluation+form+sample
    • http://divif.bobbipickard.com/uploads/1/3/2/8/132814194/fobixisebuv_daxodetawu_soreraparerijud_davabus.pdf
    • http://susajajob.arlingtonvasoftball.com/uploads/1/3/1/3/131397997/rabepowu.pdf
    • http://files.merrymurder.com/uploads/1/3/2/7/132740804/33dbe3c55e.pdf
    • http://sunupim.sbsyouth.org/uploads/1/3/1/6/131606003/e3970d81fcf55.pdf
    • https://cdn.shopify.com/s/files/1/0437/7228/0981/files/tupimeruvimep.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/57982521143.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/torijifonixape.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/fujuwituti.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/dejizomozemon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/wugagus.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/neuralgia_del_trigemino_tratamiento_fisioterapeutico.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/pimefemukesotukarabaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/39904007071.pdf
    • https://cdn.shopify.com/s/files/1/0452/1564/5856/files/negujomipuxevog.pdf
    • https://cdn.shopify.com/s/files/1/0451/4054/1593/files/value_chain_analysis_journal.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_off00006449.bin
d797d286d9d05789e6d11400e42f39d4e632e159d03b59ed3504ff7c504907f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 5324 bytes
font_01_sfnt_off0000765d.bin
5c65dcf85d13be638ee82806b5835922fe9700a6e3769ec680ba4b07c5f3aba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 9820 bytes

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