Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9a4b5fce794b27…

MALICIOUS

PDF

41.1 KB Created: 2020-09-02 07:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f6e55fe3a1cda9a4d1575d7299211b SHA-1: 0c48fabfb1dbe14d83c01b046da7906e374d5724 SHA-256: fb9a4b5fce794b27f685e164a364cbe144c0fc0c7be3cb8c31619c783da9978b
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the document's primary purpose is to distribute links to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=sql+cast+int+to+string+format
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/josazototobade.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/bank_exam_questions_and_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/8905/2316/files/zezomov.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/8000932639.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/65808479827.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/marathi_movies_2019_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/jazumaposilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/doraemon_new_movie_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/19135231864.pdf
    • https://cdn.shopify.com/s/files/1/0457/0074/3324/files/66694529353.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/57682862230.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a0b90329eae4c639336662e90f90bb4.pdf
    • https://static.usrfiles.com/ugd/07625c_16e5e84f7a564d5a90602a8da80b65eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f98010e7f1a449c86d15ffb029b3a66.pdf
    • https://static.usrfiles.com/ugd/b8c837_becfb35f1ec74b3bab30846d1b3064fd.pdf
    • https://static.usrfiles.com/ugd/0779a3_611fa92ae5884f0abde8794c4391b046.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_off00006105.bin
58a07e5b11d19bfed54214732ba6b41ba27081fab5978fd5bd9a3bb82ad475da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 5428 bytes
font_01_sfnt_off0000736b.bin
f38f03406bb604eaaff8a44275e5b7e8fd3dd0603ac83fb4fc14ca52bb33ae63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736B 10708 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.