Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f333fe134407765…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 09:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc43ffe238c7cc5a2f116861a4989f7a SHA-1: 75c1a3f266910c0e991497d17cd891921fa9f140 SHA-256: 4f333fe134407765d1d019b0c1c9f6d1ccf6fc0a952782a229fe716677f54513
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=comandos+basicos+de+sql'. This URL is the primary indicator of malicious intent. The document body, though heavily obfuscated, appears to contain the same URL and references SQL commands, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on static.usrfiles.com.

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.ru/wix?keyword=comandos+basicos+de+sql
    • https://cdn.shopify.c
    • https://static.usrfiles.com/ugd/b8c837_df810c8a8ea2474b99aefa33e2dbe80d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce86ea05c60e4daaba669e71026153f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf8b0dbdfa734305b465f109230e122d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b541fc231e8e4f18aa0aca1f83c085ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_054f7823701d4e72b3a7a00e0b0ad30f.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/renters_lease_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0423/files/join_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/pipizoke.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/lakerojabidobuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/greek_alphabet_files.pdf
    • https://static.usrfiles.com/ugd/b8c837_81e681d5b85c4fca8e435682aba62be4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d51f0409b5254051a863753429337874.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ea3711ed59f43fa8387ef0deb4c719f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7f236eb8bf84af8bce360f1a50728c1.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/fovovunoxajosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/kafevof.pdf
    • https://cdn.shopify.com/s/files/1/0463/3929/3340/files/piwezamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/96468717304.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.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_off000076b1.bin
e1e04d6f8251397c137feb8cd7e47d9922401c3cee8db079d4ced6ffbdd3e24a
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B1 5160 bytes
font_01_sfnt_off00008821.bin
0ff13981ec6ad9d222ed54f67e288cb32f584e68eea0e6a09f8c6edae8d8e92e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 12512 bytes