Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38a6d992248663e…

MALICIOUS

PDF

51.0 KB Created: 2020-09-01 14:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50abb2f2a324ba76efaecddf8fc3264e SHA-1: cbf990fe708d71cec9b8c84ccaee9b1b25bdf09b SHA-256: f38a6d992248663eca0e94b5749c29c8865498a4e86c390485c6d0a14138a347
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=curriculum+development+cycle+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, 22 of which are hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to redirect the user 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/wix?keyword=curriculum+development+cycle+pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7596/files/2723760491.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/glencoe_mcgraw_hill_math_course_3_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/the_redemption_of_callie_and_kayden.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/rslogix_5000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/61948836120.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/assembly_language_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1985/files/84952424944.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/gewepegipalesewutox.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/15551751269.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/beputixoripolimojunex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8941/9676/files/apple_developer_enterprise_program_license_agreement.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/
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/the_redemption_of_c

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008025.bin
289284455135e3aa9e38ee0cdca14a1347dbe536e7083564c16802613e368451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 1964 bytes
font_01_sfnt_off00008956.bin
0a38dc4978c64c9ace057272e657612167d680073a5e26cd3af264b45836386d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 4980 bytes
font_02_sfnt_off00009a40.bin
3f388d9c4045e0333508f8d9eac5f7c2aaa56edf765550cda8ccc79f3666d910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A40 10972 bytes

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