Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93ff50de9908a7d…

MALICIOUS

PDF

45.7 KB Created: 2020-08-29 14:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27b94e4c595d96061fbd0398914808f SHA-1: e425332d21eed7aca25a23bf64557d3fd19dbd52 SHA-256: c93ff50de9908a7dae6356331e13414cbbae3849c70761acca405d08d742f75d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a free mixtape download, aiming to lure users to a compromised website. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing directly supports this, and the embedded URL points to a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=drake+new+mixtape+free+download
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/wodugugaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/25922442813.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/12148635805.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/genad.pdf
    • https://static.usrfiles.com/ugd/565485_bc4f7beef066478ab5e88c70fbb853ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ec3383e45947c7bc008774b2a82d68.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e8b102048c4dca9b8bdb9a244ef5ac.pdf
    • https://static.usrfiles.com/ugd/cc10e7_9047885582d7483fb04a987d4dc05130.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/the_forsworn_conspiracy_bug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/78977023129.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/solopelok.pdf
    • https://cdn.shopify.com/s/files/1/0431/7128/3098/files/63830608104.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.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_off000060c2.bin
f2e4d348c10ae923f6c7ac144d8c1badcc340947d7a06505b2cea49f93e05d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C2 5232 bytes
font_01_sfnt_off00007296.bin
93330162a2b65c1a16894073453ebc62c4a203386d836a5a9dd24ee599bba781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7296 10092 bytes
font_02_sfnt_off00009577.bin
1a51fac5cecc05d5f0a5d3b698ffe240ccab470cdba6a823ba27c6c2a12c20dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9577 16060 bytes

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