Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09c734e61622caf…

MALICIOUS

PDF

69.9 KB Created: 2020-08-06 02:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa77ad86f07de749df368bc64b644a6 SHA-1: bec95970d6ebe181bdb960fdd2b85bd3cd446ce7 SHA-256: a09c734e61622caf62c35df8bb6f9e712da9d9623c939558ec46b65d0a964184
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL that points to the malicious redirector. This suggests a phishing or SEO manipulation attack where the PDF serves as a lure to external malicious content.

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.cc/pify?keyword=types+of+implicature+pdf
    • http://pigeju.zanesmithmusic.com/uploads/1/3/0/8/130874317/303605.pdf
    • http://files.redynastyllc.org/uploads/1/3/0/7/130776230/4874227.pdf
    • http://files.biolutionresources.com/uploads/1/3/1/4/131455956/b26dfd5d8bf16.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/63703050700.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/38510970768.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3716/files/dewivuzuretalexiwuvid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/kajebojodililazeluno.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/51562419427.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/kabavomajofafebojufujamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/mofewofesesobune.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/tijereluje.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/23468032231.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/mivapatuxuwusibe.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_off0000b465.bin
8674ef513b55670c59d25f8591f970540fda1163ad279dca2a25ec8160861af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB465 5352 bytes
font_01_sfnt_off0000c68c.bin
b02405e17b93d6747681c2db1763a25933297cf62f866e9c913b07c239f5e0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC68C 14796 bytes
font_02_sfnt_off0000f580.bin
d53d347cea387c54c087b2cd85ea94373ed5f2f525a48ba1569850c62da8c160		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 16116 bytes

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