Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf51d2dd9603afd3…

MALICIOUS

PDF

48.7 KB Created: 2020-08-27 14:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 699e48a1770960917bac88a88fdb65b9 SHA-1: a558384c303f39936d20f20b7661e29620756357 SHA-256: bf51d2dd9603afd3df875456f726340742975c34fc4d497103dbd203e79685dd
136 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body text and heuristics indicate a lure for a 'PDF to Excel conversion' tool, which is a common tactic to trick users into visiting malicious sites. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute malicious content.

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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+pdf+to+excel+online+nitro+cloud
    • http://sibewa.graceceremonies.com/uploads/1/3/0/7/130776167/wumoni.pdf
    • http://bilatutoz.redseainstitute.org/uploads/1/3/2/7/132740435/2f62a93b44de601.pdf
    • http://files.bombedoutchurch.com/uploads/1/3/0/7/130775126/534ca02192.pdf
    • http://files.yokko-online.com/uploads/1/3/1/4/131407958/a317f6cc88a00.pdf
    • http://files.sueanderson.org/uploads/1/3/1/6/131606060/bagajilefufeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/m_g_alpha_opportunities_fund_factsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/guwumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/43797175332.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4734/files/xejirodib.pdf
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/92665045570.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/temekakupefamubutifuxugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/nazagamedagukeziwof.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0461/files/apj_abdul_kalam_books_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/romikefimixukijegokopamur.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/96285247148.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/bus_interface_unit_of_8086_microprocessor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/name_change_checklist_after_marriage.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e57.bin
74fc7a68864193c3d85e2671bbde78a871312fcaa8771e772d08ebe2ac8c1fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E57 4792 bytes
font_01_sfnt_off00006ec1.bin
87c15ddaf8a5e4ff555008960fc0249eee18b259aa9aa043af26b2b701a0ae29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 10428 bytes
font_02_sfnt_off000092a7.bin
3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A7 16076 bytes
font_03_sfnt_off0000a74c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA74C 4324 bytes

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