Malicious PDF — malware analysis report

Static analysis result for SHA-256 353b5319c81c6986…

MALICIOUS

PDF

35.5 KB Created: 2020-08-31 21:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 566edcbe8888a953e0d1080a7150acf6 SHA-1: c555ce949b125cdd7b00fa46ba0111e0c6196097 SHA-256: 353b5319c81c6986d75ee06d17f1b02b847bddcb05829ab7190635cb0c71dd8e
120 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, many of which point to Shopify domains hosting other PDFs. One critical heuristic firing indicates a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=anr+old+songs++naa+songs'. This suggests a link farm or redirection scheme designed to lead users to malicious content. The document body contains garbled text and repeated URLs, further supporting the link farm hypothesis.

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=anr+old+songs++naa+songs
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/xuzodokugatomukifofures.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/nelumoronedewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/garofabopowepotezawakatud.pdf
    • https://static.usrfiles.com/ugd/6f58fb_011712dca76c4c66bb535df46dd8a20f.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_251a493db37645aea5f35afe8222872a.pdf
    • https://static.usrfiles.com/ugd/dd6616_4c097e00ea5c4efa868bd9ae06ed87ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fbd7408486747099e70b2d12ebee26c.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/ipl_2019_cartoon_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/26767070925.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_off00004f22.bin
43e48856884bff08c326efade66b3871e69589e8f9cfc4ee5076f3038a1329e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F22 4984 bytes
font_01_sfnt_off0000601b.bin
6bcd9d3f322fdd753325c2417f02c54d93710031b9b643e0e5cfc7cf6fffeffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 9836 bytes

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