Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61b57d3b14254bc…

MALICIOUS

PDF

48.4 KB Created: 2020-08-29 17:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffa6dcead20e7b062878acd2fd52ba50 SHA-1: e9584bb4b2098f2d4dc7c7b3c3875743e04a9f74 SHA-256: f61b57d3b14254bcf4efc7c98dfa0ccd3f1bb88a043db7ba2c50b684091afb6e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a link that redirects to a malicious URL, identified as a redirector. The document body, though heavily obfuscated, contains text related to 'the nightingale torrent', suggesting a lure for users seeking pirated content. The presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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=the+nightingale+torrent
    • https://static.usrfiles.com/ugd/b8c837_a0df2ae76987490d8f3634061c7a0593.pdf
    • https://static.usrfiles.com/ugd/b8c837_663e4901726646d3887f2caedb7ee958.pdf
    • https://static.usrfiles.com/ugd/b8c837_d00a1276db584a3a93ae5bebb2918050.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b71d75ab8ef4596b2a344b295b1484e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/future_continuous_tense_worksheet_for_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/3098/6400/files/matix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/wefebofe.pdf
    • https://cdn.shopify.com/s/files/1/0439/0967/7224/files/new_robbery_movies_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9712/8088/files/tipulub.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/47949765038.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3b43b291c5e40c28f94e13b21089103.pdf
    • https://static.usrfiles.com/ugd/b8c837_2695a57ed7294a5b84c87433aa773f5f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd3.bin
7767bfd93835af2d7d46eede6a4cfae6ba23940f7c6d754488aa3a8c13025b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 4504 bytes
font_01_sfnt_off00006bff.bin
c7beedbf682b65aedd8cc0c8dbef3b8d8205c1f865604619e5fdaceda758e8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 2668 bytes
font_02_sfnt_off00007755.bin
d15b1d170284945a09edff245e7bd2697b875a42afa57e1b4058c2127e2b76ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 15040 bytes
font_03_sfnt_off0000a670.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA670 4324 bytes

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