Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8b38a2ab998d8d…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 20:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777dee34a2202cca13b3df421f6f599e SHA-1: 892bf7df32ca401b1a179aba0c7fd7e6f5ad2b39 SHA-256: 3a8b38a2ab998d8d910b914147bf854c35c7baf902fac647e168ad2329b0cfd1
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as "Biozone worksheet answers pdf". This link, https://ttraff.cc/pify?keyword=biozone+worksheet+answers+pdf, leads to a link farm with 17 external PDF links, many hosted on Shopify. The primary purpose appears to be to drive traffic to a network of linked PDFs, likely for SEO manipulation or to host further 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=biozone+worksheet+answers+pdf
    • http://files.andrewjameshall.com/uploads/1/3/1/6/131637921/giwaxijujefa.pdf
    • http://files.nickmartine.com/uploads/1/3/0/7/130775784/rurefefifuzamitofom.pdf
    • http://files.soniapalik.com/uploads/1/3/0/7/130740200/7fa3e9a2f963b4.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/mugen_character_pack.pdf
    • https://cdn.shopify.com/s/files/1/0438/2353/0141/files/roferonolobojetavaxar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/fufumorerisigujobukujade.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/xetilimojekuwiwapigozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/duzesagax.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/wugano.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/xotesijurozefuvok.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/restaurants_operations_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/63789665196.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/tolivewalekade.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/african_traditional_religion_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/puvanevis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/breakthrough_innovation_and_growth_pwc.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/vorepurerupalipudoxiv.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_off000045cd.bin
c40beae2dfe01969977d98f6574387d29b330cc21e2f5d97d9c7b08d7509ecc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45CD 5352 bytes
font_01_sfnt_off00005818.bin
c0331c5ab4004861e1d2d9aa4a1a88f6f5e99e80f08ce10645ae16081157ad2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5818 9936 bytes

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