Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb76b0900f4099c8…

MALICIOUS

PDF

44.0 KB Created: 2020-09-03 05:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0738ff4dc66f4440dd59c87611074b SHA-1: cb3b74a29116a591c37719949157072d6e8a1ee6 SHA-256: bb76b0900f4099c8fb52cfde6333a70966be28fd75ac942623eca1dcae2ee42e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link points to a redirector URL, suggesting an attempt to lure users to potentially harmful content. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link-based attack vector.

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.com/wix?keyword=dolomites+italy+tour+guide
    • https://cdn.shopify.com/s/files/1/0435/4975/3493/files/16457025263.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/angulos_entre_paralelas_y_una_secante.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/vomiwupaxapufafejikezujix.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b04013cab2f47e3a52409404ed29aea.pdf
    • https://static.usrfiles.com/ugd/cc03df_1a25acf5369d40e4b2f989a0e24655d6.pdf
    • https://static.usrfiles.com/ugd/6df952_1340e63cb00c43bdb8906dce21f0306d.pdf
    • https://static.usrfiles.com/ugd/c8a981_b480e722e9654d1288278de7114a5c61.pdf
    • https://static.usrfiles.com/ugd/0f5b72_af0f3e97c54e4eaaa12c14c2f9710d81.pdf
    • https://static.usrfiles.com/ugd/5899d5_ecdc9c4ad7e04b4a969e901f6b1e240d.pdf
    • https://static.usrfiles.com/ugd/83f04e_1490368df36e4344ad6ef375c742e395.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7a807859dc34f56aad9b7afb7e94efb.pdf
    • https://static.usrfiles.com/ugd/493135_8e754c1a4f114dfaa91bf166e0eb8ffc.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_c28c99f0dadd4af2ae7d230b43dfc9f1.pdf
    • https://static.usrfiles.com/ugd/6a7407_0f856ed917c741ff91ac3491575fe738.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_off00006de1.bin
99df7f5e4eb5a07da0a5a6c6c80379a6890608fb53c1866016b34abef246985b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 5248 bytes
font_01_sfnt_off00007fab.bin
e5e9f68908b6adf5f4fef00d370d2bde5269f5362eb0914c340d1089c3cf8213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAB 10400 bytes

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