Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4e90a03e04fc89…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 09:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51db102b9c1e464fedc91599aff1a133 SHA-1: f70ea7714c135619eb7054a3d54572045707d74b SHA-256: dd4e90a03e04fc897ea005f6ccf03c7db2c032701f4ef7d9da44a559aa57ede5
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'piano sheet music' and the malicious URL. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious content through numerous linked PDFs. The primary malicious IOC is the redirector URL.

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=jump+up+superstar+piano+sheet+music
    • https://static.usrfiles.com/ugd/4b68be_e9d67de3387c4c249708f7d9fbe3e1de.pdf
    • https://static.usrfiles.com/ugd/4d400c_91f4228e3d094a45b54a8364e8ea1319.pdf
    • https://static.usrfiles.com/ugd/4bb894_b916232c3f7a453885c13dd19f8cb92d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a869920c2be9433d96f3d89cfd14d061.pdf
    • https://static.usrfiles.com/ugd/299074_0bd022d85f4a4049b1eb1e8e0530eb46.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/lulofexunibepus.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/vonepozutubapotefigulujuw.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_f0649d598ec3477fba6c4794fcafcdeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91a8d6cd1764ee89fb98ba89efd4be0.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_013c730d553148c284d2d310056382a5.pdf
    • https://static.usrfiles.com/ugd/1cfe37_421373b8e9bd4493921d2471724aac2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eae251b4b8e4c9ba249b3909f9d088d.pdf
    • https://static.usrfiles.com/ugd/538d67_c8dba1a3bf8642b3b0404c65bb7c2274.pdf
    • https://static.usrfiles.com/ugd/51c472_c2161810e6284850900980dd17acf71f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ffd.bin
1e0565a3d4bd93fc09d1a45d4f49bd2579b675794a8a4488c2273c44a6ab97f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 5012 bytes
font_01_sfnt_off000070d1.bin
8e5ca80c611726164ec88ad5c275e943f22f36e0317e77923fbac6ec7037ca79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 14596 bytes
font_02_sfnt_off00009e94.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E94 4324 bytes

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