Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc93c30e94c11eef…

MALICIOUS

PDF

36.6 KB Created: 2020-08-31 04:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90658fac4c4b4b0590aa02b6d5bd7f26 SHA-1: 863fae9955c4df578b14d68bf2cec75fad83a852 SHA-256: bc93c30e94c11eef23ba31b83e75be96f3941b55cc6b6a85b9339288e0e3e365
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading music and the malicious URL. The presence of a link farm suggests an attempt to game search engine results to distribute malicious content.

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=musica+para+descargar+de+cartel+de+santa
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/arcane_mage_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/nubulugizitunoxex.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/guvurugadadu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/photoshop_templates_free_birthday.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2792/files/gokirozurixewixefasi.pdf
    • https://static.usrfiles.com/ugd/60933b_5a5f56e97b7842e8b818b44537e7bc5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_019a09f021114217a5f58feee6ad44b6.pdf
    • https://static.usrfiles.com/ugd/c1615c_8228eec83f5f404394dd34ad6939640d.pdf
    • https://static.usrfiles.com/ugd/cac9e4_a0bde97d3d5b42dba4f44cdee2ba741e.pdf
    • https://static.usrfiles.com/ugd/930050_65a11110d5124b9296d7f3c2282763f7.pdf
    • https://static.usrfiles.com/ugd/e73fea_5dbf5131308e4c00a5cc1093a1413c5f.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/42900493786.pdf
    • https://cdn.shopify.com/s/files/1/0448/0555/4337/files/koxofomaxawitogukututa.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_off00005047.bin
87baa565eaf17893a44025690262a3f2a86cb54e4d0181bb2f075286e1418774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5047 5248 bytes
font_01_sfnt_off00006233.bin
1b4dc54ce6f26b6f287ded50978be76222d7d018d1c2687e0821b204724b733a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 10884 bytes

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