Malicious PDF — malware analysis report

Static analysis result for SHA-256 3300847525aad38e…

MALICIOUS

PDF

57.1 KB Created: 2020-08-31 05:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e72fd4751673e17075c42bfbf69902ce SHA-1: 570e71f2ed07e34f5f621d4d736e988943a7de79 SHA-256: 3300847525aad38e6657467cadd9cc44e08197d77cf61b257a5895d376a8bdf8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. This URL is used to lure the user into downloading a game. The PDF also contains a large number of embedded links, many of which point to Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BA%25D0%25B0%25D1%2580%25D1%2582%25D1%258B+%25D0%25B4%25D0%25BB%25D1%258F+%25D0%25BC%25D0%25B0%25D0%25B9%25D0%25BD%25D0%25BA%25D1%2580%25D0%25B0%25D1%2584%25D1%2582+1.5.2+%25D0%25BD%25D0%25B0
    • https://cdn.shopify.com/s/files/1/0431/3972/7521/files/sezuzapigofolabonozux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/dotoropatemaram.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/30816089457.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/moxamivevusuzadifuvepepon.pdf
    • https://static.usrfiles.com/ugd/4c1554_29e725fb83e0488fab925c8a39270cca.pdf
    • https://static.usrfiles.com/ugd/daca0d_32f157bffe9342e484956be09aaebd4f.pdf
    • https://static.usrfiles.com/ugd/837d34_926185997d4d4fd2859b61fa54ca3b9b.pdf
    • https://static.usrfiles.com/ugd/67e251_6c16197ff72d418e96c258cc61afd004.pdf
    • https://static.usrfiles.com/ugd/b8c837_d078420971214a67ad774ede501d4b52.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92885005f1e4e63921941a4326e60d0.pdf
    • https://static.usrfiles.com/ugd/d902bb_2bdc24e45738408a842b92a68af86fb6.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_40fd01c387194e3298f3b32cee943685.pdf
    • https://static.usrfiles.com/ugd/f459ea_38ac4938c6f245629507c927e93eaa1e.pdf
    • https://static.usrfiles.com/ugd/c0b427_48c352e71448453cb31723a1a93fb790.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_off0000929b.bin
30bed9cbe54702572fe043eb2712fe7f1b068f250fa09a5e09cd53c2f0501e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929B 6036 bytes
font_01_sfnt_off0000a6f0.bin
63f3c4337e06f1e9255a8123341f940e4fa787bdcaac1135592ee5a631a890d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F0 14804 bytes

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