Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3efa7d8b5bbc0e5…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 23:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb82b84f249fc214646156a25f28d6d SHA-1: 82abf62fcc186648fc48236e9ac0e8a37524ae0f SHA-256: b3efa7d8b5bbc0e508cc448c18ab9c2f3e3308057f3982a6faa713ceb6493a9f
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document also employs urgency lures and prompts the user to install a browser extension, common social engineering tactics to facilitate malware installation or credential theft.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=c+form+frro+pdf
    • http://files.georgethequarter.com/uploads/1/3/1/0/131070374/16d12e26428d.pdf
    • http://zemejisa.sculpturenwood.com/uploads/1/3/1/4/131453536/8d38f1fae8aa13.pdf
    • http://files.tombacher.com/uploads/1/3/0/8/130873921/mefojoz_dofuka_pokopof_tusipexujex.pdf
    • http://files.malawiecosolutions.com/uploads/1/3/1/4/131408170/1605936.pdf
    • http://files.thujar.ca/uploads/1/3/1/4/131453206/e8e7056677.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/waxamilagozovimixulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/jenivibotibir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1989/files/business_correspondence_report_writing_sharma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/motorcraft_oil_filter.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/34847768051.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/55077971476.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/dubadibotoguxofamolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/vijulolefuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/befogedegobileloj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/avalon_hill_gunslinger_rules.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/nusexusinurulepegakino.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/19341263721.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_off00006b96.bin
66aec32dcc734fa31e35de3e2d5049a1871e5f5cc5856ae4d5d0729d7316b44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B96 4224 bytes
font_01_sfnt_off000079dc.bin
f4cfa03dad24ebfc42b2477bc572e910285c2d887179f7dc67960ca926a48f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DC 10044 bytes
font_02_sfnt_off00009c2f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2F 4324 bytes

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