Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a809f65019fe09…

MALICIOUS

PDF

39.3 KB Created: 2020-08-10 13:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5299d7be6da04396aed5ff4790051331 SHA-1: 44f0f90db4501baf7e7fe4e426793ad5c263c246 SHA-256: 82a809f65019fe096dd7c5b8baa44cdc6a81adfb46cb61d54083f747ada48315
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to 'ttraff.cc'. This redirector is known to lead to malicious infrastructure. The document body, though heavily obfuscated, contains the text 'Clinical examination book for medical students pdf' and the malicious redirector URL, suggesting a lure to download a book which ultimately leads to a malicious site.

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=clinical+examination+book+for+medical+students+pdf
    • http://files.quantumfoundations.org/uploads/1/3/1/4/131406800/fokusegejomub.pdf
    • http://files.3riversmuseum.com/uploads/1/3/0/7/130740213/0e663.pdf
    • http://files.marissagable.com/uploads/1/3/1/4/131453054/kadexijerob-futumodirokak-sazevatuxebe-bibojuduxufod.pdf
    • http://files.villaamizade.com/uploads/1/3/0/9/130969293/moxerifetinipowuwig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/favikotarogepuvef.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/jimuwizasaguxikatosuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/kewizaxeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/bonob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/tasologobaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/xedejeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/vabakefa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/xatologo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/boxonumilanunowumoxunetaj.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_off00005aa9.bin
ea4923f5bd918ce0803cbc05a8a93b1614625cff30dda588a74337ec74e69104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 5476 bytes
font_01_sfnt_off00006d2a.bin
2e8877b3a36e8fbc171ffbfde10e095902e484e5dfa4fd488ed34a318d039c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2A 10284 bytes

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