PDF malware analysis — malicious · 3816b98c1b8c353f

MALICIOUS

PDF

53.8 KB Created: 2020-08-29 09:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 59285219cf1ad4c8011209da95ade563 SHA-1: 5ead900838f5a8538c005fba3ce3d144ff9c6404 SHA-256: 3816b98c1b8c353f724c84761293a87b3af5c2a86e59d4aab502d119b92fb63f

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a suspected SEO link farm. One of the primary links directs to a known malicious redirector, 'ttraff.ru', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to academic content, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=chemistry+the+central+science+10th+e
- https://static.usrfiles.com/ugd/b8c837_d11437a55e144f4ba2404a42807a9aa8.pdf
- https://static.usrfiles.com/ugd/b8c837_033de887905148569c3e85de2ab17e19.pdf
- https://static.usrfiles.com/ugd/b8c837_c207b765a0f34def87e54e84cc07233c.pdf
- https://static.usrfiles.com/ugd/b8c837_1704dd35a41148099ccebb10aa52a13f.pdf
- https://static.usrfiles.com/ugd/b8c837_32473a743d01447bb5e2ad934c3fa5c6.pdf
- https://static.usrfiles.com/ugd/b8c837_83ed7fecf43645cf9dda821df40c48f0.pdf
- https://static.usrfiles.com/ugd/b8c837_9acd4a48cc8e4e84a570bd63d510f73d.pdf
- https://static.usrfiles.com/ugd/b8c837_ec71f45bc38b441abfd4a651d95fe5a8.pdf
- https://static.usrfiles.com/ugd/b8c837_e9c4ddd1fcf14e5c8f4eefad11cccdba.pdf
- https://static.usrfiles.com/ugd/b8c837_bd66b6c7562f48c5b4de791bd6cd4ed2.pdf
- https://static.usrfiles.com/ugd/b8c837_cd6e9c277a174e03bbff649f980c8150.pdf
- https://static.usrfiles.com/ugd/b8c837_0e89944775ce4cac9cbbc9645d74763d.pdf
- https://static.usrfiles.com/ugd/b8c837_107956d41240409694fc7b6a865564cf.pdf
- https://static.usrfiles.com/ugd/b8c837_6f4a1a315b8d4368acb3bb158be2ed23.pdf
- https://static.usrfiles.com/ugd/b8c837_c68620902859432095bf6ea14c335038.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007835.bin` `5319cb5820856483725a020394f358372e5fd913c484725fc023080e14f5cb92`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7835	5252 bytes
`font_01_sfnt_off00008784.bin` `e574680c28cf6d869d9455231f380efe8518da03fb7f3466c8823b4b975a8537`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8784	5036 bytes
`font_02_sfnt_off00009877.bin` `39994899b03ef6b7a00740015743d81d46096e1d66e1a26229e8a7e44f8f87f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9877	10376 bytes
`font_03_sfnt_off0000bbcf.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBCF	4324 bytes

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