Malicious PDF — malware analysis report

Static analysis result for SHA-256 9826b8622eb64e08…

MALICIOUS

PDF

43.8 KB Created: 2020-08-29 08:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c3767c45dae1496947bb6ab3c760426 SHA-1: 6b747df0fb0df9ce9cf65b03fc8686f0f2cce899 SHA-256: 9826b8622eb64e0892ca32fe82103d55ede49cae3f4d3d04827af05499dc0b2b
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, also contains the same URL. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or malware delivery. No scripts were extracted, limiting further analysis of the payload.

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=ejercicios+de+matematicas+primer+gra
    • https://static.usrfiles.com/ugd/b8c837_8ef3bf5d474648d9874d6aa759b6362b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a1da7199a44c059a1aa85f7bc1cda8.pdf
    • https://static.usrfiles.com/ugd/b8c837_638cac4b10724680baa180b43a0714e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bb7376ddafa4b858ccae59bcf8f2591.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/57839610715.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/74466418643.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/sql_formatter_online_tool.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/87798788057.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/bsc_nursing_1st_year_biochemistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/8594609743.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/job_interview_questions_weaknesses_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/gifijejodawurizoji.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1597/files/activity_based_costing_and_management_project.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cef.bin
b961abbdea020cc7ec064e2558b5c635d78f8f09590917b7130ea17603764c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 5076 bytes
font_01_sfnt_off00006e37.bin
41f1d6dc443f651d0b0057122083d88dd714212ea396dc8ae89a1c47b4a90255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 11064 bytes
font_02_sfnt_off00009240.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 4324 bytes

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