Malicious PDF — malware analysis report

Static analysis result for SHA-256 439331f612df9a33…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 10:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d01f878d9c2fd9a4a90efb409cc6408 SHA-1: e65385d3ce2984f5ff7b3482953f5d6f6dac6674 SHA-256: 439331f612df9a33a9b34d037c7da940c6a32c073f20cb2ba5148f6b637abc91
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, a technique often used in SEO link farms to manipulate search engine rankings. One of these links directs to a known malicious redirector, indicating a potential phishing or malware distribution attempt. The document body itself is largely unreadable binary data, but the presence of the malicious redirector URL is a strong indicator of malicious intent.

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.ru/wix?keyword=test+de+denominaci%25C3%25B3n+de+boston+puntuacion
    • https://static.usrfiles.com/ugd/086daf_933f7e12168547358de208d0c12208cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4d4ae52d7941bdb4a5f76737f27e19.pdf
    • https://static.usrfiles.com/ugd/72216b_467a2d5cdf5146c98bb02000142a79d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ca20bdd69f449092973dcd8338800b.pdf
    • https://static.usrfiles.com/ugd/f09a9d_567be079ec474c07add7bcfb6eafee10.pdf
    • https://static.usrfiles.com/ugd/724fb5_84262670dae54476b2b93582e39d82d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bb36fedd0e64de69d0081b36b672f7a.pdf
    • https://static.usrfiles.com/ugd/b0cd75_4e9d8aaba732460ab93e0e3b6fdf3a69.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/65352953164.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/anpadh_movie_songs_pk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/powers_of_the_psalms.pdf
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/50051342856.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/zudavefazokavodavigot.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_off00005df3.bin
dcb9d879148b5f80052842a50b79b3aebcb0f43cf8e79ad208b3be5a3d0b67f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5316 bytes
font_01_sfnt_off00006faf.bin
2ee934477a3704573d323e348a92dbcc20d9f813617a4166266992ed28b7c160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 10496 bytes

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