Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52afec9c5005906…

MALICIOUS

PDF

62.9 KB Created: 2020-08-31 20:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867cfa3c2ffe197be4fa853f96ca3350 SHA-1: 133a66175849189fd1bae84b9bae86292503c072 SHA-256: b52afec9c5005906657bd672abe75632a8de74c64dc16eee3581f69b7d3310c7
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, it features a link farm with numerous external PDF links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=influenza+b+fact+sheet, which is likely intended to lead the user to a malicious site. The presence of urgency language further supports a phishing or social engineering attack pattern.

Heuristics 4

  • 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
  • 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/wix?keyword=influenza+b+fact+sheet
    • https://static.usrfiles.com/ugd/fbccce_33f566b308754058bf2f450b751a3981.pdf
    • https://static.usrfiles.com/ugd/238140_0653e935e7634a25993151dd302354d1.pdf
    • https://static.usrfiles.com/ugd/67e251_1b55093a42dd4ce3b961225fddd47cc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb3e57e73b34600926a1f02be3caadf.pdf
    • https://static.usrfiles.com/ugd/c1de29_7a1743f4ce9e423d9d4951647fccff71.pdf
    • https://static.usrfiles.com/ugd/824332_2122537a89e34e40a3b972eccd045812.pdf
    • https://static.usrfiles.com/ugd/32acb1_a0eaf5e1728d4229b4cc5f0e62125221.pdf
    • https://static.usrfiles.com/ugd/cc14e4_4f4267e9cc474304aedfae925cd44d94.pdf
    • https://static.usrfiles.com/ugd/3eed2b_0a2ee0b1d6bd46d5a7bd927054a0663c.pdf
    • https://static.usrfiles.com/ugd/bfbc46_bf7b2416cf784ad08d785647d9775cbe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/fuxidoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/catalytic_cracking_unit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/89847367833.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/ligadura_de_cordon_umbilical_tecnica.pdf
    • https://cdn.shopify.com/s/files/1/0463/1239/0821/files/business_plan_executive_summary_sample.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/nuteg.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/human_anatomy_terminology.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/aspects_of_political_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/jagazamavetotumikar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/90420195912.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_off0000b18b.bin
da6273511fc4ef707f9b61e031848bd6a49b7507e612589cf4c2564071488535		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB18B 5000 bytes
font_01_sfnt_off0000c296.bin
0fb8eed208fa067847904348396cc332a33637ed318f930eae208ac306610264		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 14088 bytes

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