Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a22815ddecebccd…

MALICIOUS

PDF

43.7 KB Created: 2020-09-01 12:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0c709de3d4732b0da5d22dece3fd31f SHA-1: 458a16e7e8fce2c933f1162a4416581f66d211f2 SHA-256: 1a22815ddecebccdfae6d4882ba7487052fb07b5b68942848deeb790653cd850
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious URL, disguised as a movie title. This indicates a social engineering attempt to lure the user into clicking the link. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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/wix?keyword=informers+full+movie+2008
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/gijejukotezubimikunolinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/xegize.pdf
    • https://cdn.shopify.com/s/files/1/0435/8366/8392/files/2453184999.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/76704483952.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/6299697705.pdf
    • https://static.usrfiles.com/ugd/912de2_3fdf769dbe4a4851b2532cf9831e7981.pdf
    • https://static.usrfiles.com/ugd/b3bc21_eb62272939904199953602b5d6cdac0a.pdf
    • https://static.usrfiles.com/ugd/7f929b_f6f906a7f5874e9ca529f2cf2358b2ab.pdf
    • https://static.usrfiles.com/ugd/086daf_6f0269cfe4d14f8d8b18306412e6ff22.pdf
    • https://static.usrfiles.com/ugd/7ff653_59b0f0f5b0f34b05b240252308466ffd.pdf
    • https://static.usrfiles.com/ugd/69b86f_934996356eb34d0d9946f85e8c5fdbe4.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/97286019207.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/60102613970.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_off00006da0.bin
cdd0c64bb5d1124ed6322dc3e573d9e27d2de47ad08037b38cb78f477f4b0b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5168 bytes
font_01_sfnt_off00007f2c.bin
5e28e2a00cdfa070eebc55961b9070a005e5368f78e5c9892894bd09d0943704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2C 10340 bytes

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