PDF malware analysis — malicious · 30e7b61c44c38246

MALICIOUS

PDF

36.3 KB Created: 2020-08-30 17:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8618faba37d44fc34ad2d1cf839a75b3 SHA-1: 92e18279507527abd15741b88c439d15e514554d SHA-256: 30e7b61c44c3824698c3c27739a88d586c485aa034338735c3a1861c0400ce25

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a direct link to a redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Mi entorno virtual de aprendizaje' and the malicious URL, suggesting a lure related to a virtual learning environment. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, further supports the link farm heuristic.

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=mi+entorno+virtual+de+aprendizaje
- https://static.usrfiles.com/ugd/b8c837_6f19988edcee4f85a9c29f7c89c210ff.pdf
- https://static.usrfiles.com/ugd/4b874d_5f27809285034706891deb3fe712a7b8.pdf
- https://static.usrfiles.com/ugd/65b209_305c93bfb352461cad33fad1fb87674f.pdf
- https://static.usrfiles.com/ugd/0f5b72_a19524a79d7f4b5a888cc98fcfebb4a0.pdf
- https://static.usrfiles.com/ugd/b8c837_0c5db20b1182413285f81f951a5e9a2c.pdf
- https://static.usrfiles.com/ugd/625844_c31ad03f458f470c8e079370facb232e.pdf
- https://static.usrfiles.com/ugd/b8c837_14104f3d5adf4f858db1a113b1010be9.pdf
- https://static.usrfiles.com/ugd/834936_18108b3882c341b0ba0f58be64f31929.pdf
- https://static.usrfiles.com/ugd/b8c837_c44f3fd8d7484c5a90e2b946249492ac.pdf
- https://static.usrfiles.com/ugd/c836c3_43dbc7c4c521479aaca1ed262f83f136.pdf
- https://static.usrfiles.com/ugd/71fd01_47742774472a4546b6e20dc787e24bef.pdf
- https://static.usrfiles.com/ugd/b8c837_b9c78eaad5fa42b4ab06b33cb13b0076.pdf
- https://static.usrfiles.com/ugd/b8c837_d29235c1929843d69cb03509ddb847cf.pdf
- https://cdn.shopify.com/s/files/1/0437/0307/4984/files/wii_codes_generator.pdf
- https://cdn.shopify.com/s/files/1/0428/2286/0966/files/bujiwexuninijazelajetekud.pdf
- https://cdn.shopify.com/s/files/1/0433/0032/3478/files/c_programming_with_arduino_warwick.pdf
- https://cdn.shopify.com/s/files/1/0434/4525/6344/files/69875535488.pdf
- https://cdn.shopify.com/s/files/1/0435/8828/8671/files/robot_compliance_test.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004c79.bin` `9d7b6ed720c06384793b88fc478eed4a2001d95a24ee9087c5bb4dc997497644`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C79	4968 bytes
`font_01_sfnt_off00005d87.bin` `0d37a39a5e625e5345cdca5ede6790474227f36692041e800a2b4308c65ad92c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D87	11296 bytes

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