Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d1d74655ff21cc…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 09:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 622b1fd1f0131bbf340614248279f734 SHA-1: eb28c7612fbc2350c8bc74758f3e8805a5d3ec02 SHA-256: 44d1d74655ff21cc65eedf2fcd8bbcd03233b247b48832c333b37050b1e219ac
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a template for executive board meeting minutes, likely a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, but the primary malicious redirector is the most critical IOC.

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=executive+board+meeting+minutes+template
    • http://didaw.noahsplacepettingzoo.com/uploads/1/3/0/7/130775320/sipuwunajope.pdf
    • http://files.korovai.com/uploads/1/3/2/6/132695384/lutefexitonuw_vilaredowir_lutanamip.pdf
    • http://files.alininspirations.com/uploads/1/3/1/4/131453645/dacebe4e.pdf
    • http://fapofobo.alden43dressblue.com/uploads/1/3/2/7/132740214/8d136b6d42c5af.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5222/files/98319822926.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/37219646788.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/bruchrechnen_addition_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/30262185704.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/wifuzuxesepibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/jiwiriluza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/4695998121.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/pokemaguburavuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/digital_signal_processing_proakis_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/xexixuxusirixujupak.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_off00007dcb.bin
31c2a4b734dec86aa987150a56e963d4587bfef86c26328c7e85622bcfde5c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 5620 bytes
font_01_sfnt_off000090c6.bin
9d24ef16d341236461ba0ef118e83d8e4bc02ecdd64ebaabcdfc0b368b06152f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C6 9756 bytes

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