Malicious PDF — malware analysis report

Static analysis result for SHA-256 472854fc25ae66d2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 00:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5711a2b0425525093d6b101292e3473f SHA-1: fbe6bb1123918cdf8c459a0903e35cd7a4cf50a2 SHA-256: 472854fc25ae66d2d2604f9a31e79ec4ffd1f8b670bc353c068a4d4fce667c02
120 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, though heavily obfuscated, contains text related to 'acute respiratory distress syndrome' and a URL that appears to be part of a link farm designed to attract search engine traffic. This suggests a phishing or scam attempt where the user is tricked into clicking a link that leads to malicious infrastructure.

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=acute+respiratory+distress+syndrome+jama+2018+pdf
    • http://files.purposewny.com/uploads/1/3/1/6/131637928/5893329.pdf
    • http://memijov.edmontongreendragon.ca/uploads/1/3/0/8/130813528/fufukediriw-potazifif-jagosuleka.pdf
    • http://files.katherinemarieprice.com/uploads/1/3/0/7/130776296/3140051.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/zisub.pdf
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/vulefutimuzuvuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/fididewoxosugitusinumod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/autodesk_inventor_professional_2017_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/senanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/31972473416.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/girosavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/novena_navidad_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/fubifewumisipiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/14110820882.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/bcs_power_plan_book_download.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_off0000633a.bin
e545a372e0762770914e7d9b38c05afe05792da4cc9da40759359097144b78e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 5956 bytes
font_01_sfnt_off0000777f.bin
0d874f1c8595a1ae704403fbbc8e481f83fe0d42785565da611874a9805c7c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 10700 bytes

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