Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc5981127c4409d…

MALICIOUS

PDF

38.7 KB Created: 2020-09-01 01:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ddf85243eb90aa5ae9014a5e732ec3d SHA-1: 550711fb8989dfc23d5ad32c7ad0b08311b8efa8 SHA-256: edc5981127c4409dd9bb34c1ae441a3161ab6630deb184d478eb1e050e9066ed
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. This indicates a link farm strategy, likely intended to lure users to malicious sites. The presence of numerous links to static.usrfiles.com suggests a coordinated effort to obscure the final malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings strongly suggest a malicious redirection attempt.

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=entropia+universe+mindforce+guide
    • https://static.usrfiles.com/ugd/ae059d_5feb742565394e0b9e92ee660eafec9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed59e422ec054ee081e18de4f03e6c5c.pdf
    • https://static.usrfiles.com/ugd/f4de5e_bc2913e3a6be42e3b6e60bfedfcb368c.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/healthfirst_otc_lista_de_tarjeta.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83e55ae049b44ef9bea7ddb6f6da725.pdf
    • https://static.usrfiles.com/ugd/b8c837_32bc560b756d44e78d1964fecf29cc72.pdf
    • https://static.usrfiles.com/ugd/e3325f_526c4da98d1f4a1cb5cf3ae18f35382a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.pdf
    • https://static.usrfiles.com/ugd/73c254_e76f137c45d7493b8c14d6c1dcb943c0.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_off0000595d.bin
b22b67595e1220567a3e49064514803cbc0b35c5f7c90d74049a9ddaa7ec765c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595D 5460 bytes
font_01_sfnt_off00006be5.bin
87355bf7d7a38a70aa95509397f1dca88c37521ad6f48ba84bde80362e8c4935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 10040 bytes

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