Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5387f5e221f6cc3…

MALICIOUS

PDF

35.9 KB Created: 2020-08-31 10:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52421d9806379cd8b0b8e1aaf0ebe71 SHA-1: e1a243e5d19cd2a11596d775efa2ba7f827f3a9c SHA-256: b5387f5e221f6cc3dc679c10d12cc1b6de0d4927cedf2d286764aae2cd1f7d45
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'sedona method course workbook pdf' and the malicious URL, suggesting a lure to a scam or phishing page. The presence of numerous other PDF links, many hosted on 'static.usrfiles.com', indicates a potential link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=sedona+method+course+workbook+pdf
    • https://static.usrfiles.com/ugd/1849a1_4576ba96044a4211844ed7e58e1f9fcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_563bce6c44624919b8f09561690b991b.pdf
    • https://static.usrfiles.com/ugd/b28561_80846aa206674dd3b39e3ae6f892f942.pdf
    • https://static.usrfiles.com/ugd/05900a_d0d08db48f044ca0912eb3d981b3faa4.pdf
    • https://static.usrfiles.com/ugd/9ea91e_448539794d214147b65a9866834ad4bf.pdf
    • https://static.usrfiles.com/ugd/8b49c6_59578eb81d8643babe4baa251dd4a29b.pdf
    • https://static.usrfiles.com/ugd/cf79db_21c7ecfb0fdc45a0979c8e542584d028.pdf
    • https://static.usrfiles.com/ugd/11f207_747cc1b44fa741bfb5a67d54ef6326ea.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/tawusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/xojofobixesejakotelegeku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/kowaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/97326561997.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6958/files/62329672916.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_off00004e26.bin
18635e068574c534905f3720b38bd8fdf0d3f8cc3d7d7249f375e2dddd1f83f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E26 5764 bytes
font_01_sfnt_off0000619c.bin
0b4206fd03626af63d31df92fe42c097f33a334cd9b96ab84f24f2ec2e1f3b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 9800 bytes

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