Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24c9d16233dcc5e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 00:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2542a1aa1b5db8f2f924777eabe8c7d SHA-1: b9a18746e905eb103bea18063d29c646ac08eeaa SHA-256: b24c9d16233dcc5e954a669242be941dd49c9f8f1715c44dc61c8cdfa21f1e1f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to other PDF files, many hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=skinner+ciencia+e+comportamento+huma, is identified as a malicious redirector. This suggests a link farm or redirection attack designed to obscure the final malicious destination.

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=skinner+ciencia+e+comportamento+huma
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/70972033130.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/vokotedekobepuxoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/muzewugima.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/forskellige_hudsygdomme_billeder.pdf
    • https://cdn.shopify.com/s/files/1/0452/3101/4045/files/serogaroz.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f415b5d794238838a0d95b049f254.pdf
    • https://static.usrfiles.com/ugd/6da380_ec3f99a427934d7c8854fbafb7c3fea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b75c2ec8b442cbbc60aa9968ffe8a5.pdf
    • https://static.usrfiles.com/ugd/b7ab08_b294c456d29745c68d306200cca46dca.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/how_to_dump_mii_maker_rom_3ds.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/elite_strategic_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/66130662272.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/pdf_to_spreadsheet_converter_free.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_off0000648e.bin
d2e16846d3680ac037762a213eb668a6fe257d62e49020bb5913ef8a881608e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 5128 bytes
font_01_sfnt_off000075cd.bin
f0cd597bd88133d2c6474bb64227b8509f672550032e96b7a6c978cb47132c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 10948 bytes

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