PDF malware analysis — malicious · be78a0cb0604f19f

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 05:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ab1141b5ec1b0fe48899c62ed0540d19 SHA-1: b779b96a36c76d1459a2c9cb7ba0168ef5aa502a SHA-256: be78a0cb0604f19f8f8d8bec001e13fc8a009ade81f19814dde6b29987dc7cb7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=effective+cover+letter'. This URL is embedded within the document body, suggesting a social engineering lure. The document's purpose appears to be directing users to this malicious site, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=effective+cover+letter
- https://static.usrfiles.com/ugd/a1fb72_3e0bf78350b84788acb8146f9d97d327.pdf
- https://static.usrfiles.com/ugd/b8c837_4ebee40831c845dfab009c960da293fe.pdf
- https://static.usrfiles.com/ugd/b8c837_b291d8e5287540a7a20338fd5a39b0c9.pdf
- https://static.usrfiles.com/ugd/b8c837_f93452b4e75f4affa44ca5eb0e7cccdf.pdf
- https://static.usrfiles.com/ugd/a18aa6_12df60405a354b67a058356eb2e54025.pdf
- https://static.usrfiles.com/ugd/0bcf16_8e159a4e184a41d3a2c6cfba21afe515.pdf
- https://static.usrfiles.com/ugd/b8c837_dc6dd03b97a1489d91a051f65fcee5ea.pdf
- https://cdn.shopify.com/s/files/1/0437/9354/7426/files/todofori.pdf
- https://cdn.shopify.com/s/files/1/0431/0866/3462/files/soginizule.pdf
- https://cdn.shopify.com/s/files/1/0453/6434/7035/files/45654061032.pdf
- https://static.usrfiles.com/ugd/b8c837_eaec37f21ff64c6ca47c91c912292bbe.pdf
- https://static.usrfiles.com/ugd/b8c837_1bb2aa7339834f3a8358bd9568f5b3e9.pdf
- https://static.usrfiles.com/ugd/3b47cb_dca1b37ea50340f4903c8f80936362a5.pdf
- https://static.usrfiles.com/ugd/b8c837_6e0e2978297c4e5b85739e5cd181b409.pdf
- https://static.usrfiles.com/ugd/9734e7_4f5a4e17fea44d24add4ffafc2ecc6e5.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_off00007dde.bin` `c17b7825d85537c4f39240adeb734df8bac6b6e2fc8c02b5648cedcda280fe6b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DDE	4504 bytes
`font_01_sfnt_off00008d41.bin` `bbbed221b98ef807c9831e4b7305bb0411d49a63f322308fb471d49c80b3a763`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D41	10488 bytes

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