Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef74669ff0ee6505…

MALICIOUS

PDF

43.0 KB Created: 2020-08-26 22:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d3082d727e4d856128a0ecd0e911444 SHA-1: ac4d6493bc92b23358d98670f0505935a9566522 SHA-256: ef74669ff0ee650527e7f1754b4d57025ede2b2b2ddc5b8a17cdeab8d46e96c6
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/pify?keyword=ieltsfever+general+reading+practice', suggesting a lure to download further malicious content. The presence of numerous links to Shopify-hosted PDFs indicates an attempt to disguise malicious activity within a seemingly legitimate context.

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.me/pify?keyword=ieltsfever+general+reading+practice
    • http://files.snydersbuildings.com/uploads/1/3/1/3/131380558/5f42a7.pdf
    • http://files.lashthetics.shop/uploads/1/3/1/1/131164009/kavirovofakare.pdf
    • http://files.jewelrybyhearttoheart.com/uploads/1/3/0/7/130775275/xezuxibow_zatobasisiwik_xidedufisisifi.pdf
    • http://kivop.missstonerocks.com/uploads/1/3/1/4/131453540/6872095.pdf
    • http://files.hisinsouthafrica.com/uploads/1/3/1/3/131398424/gimejav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/95491937387.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/guges.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/climatic_regions_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/25742207306.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/75876386730.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/42112367643.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/que_es_apgar_familiar.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/fuzalok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/linux_shell_scripting_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/40141280201.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/dinewulejuregoborepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/sejarah_bilangan_bulat.pdf
    • https://cdn.shopify.com/s/files/1/0462/4872/2583/files/25666427746.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/tipufu.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_off00006711.bin
1dd70752765e5a46abd1503ece459c2e0d915b7bac34f25783095c89063190b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 5320 bytes
font_01_sfnt_off00007935.bin
b28bb6f09b2b50d1c52dc87b8ea142aeff86e1c01c6bcc3003dd9c3abdb10a71
pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 11240 bytes