PDF malware analysis — malicious · 9529932352280e8c

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 07:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bccc112ce66d9d1f0b292aa99ee3d393 SHA-1: 3f8642a52f90b2fe79963d724677af5db6ee3c91 SHA-256: 9529932352280e8c75ee85a9afbaf3a8920765981aa723b79f705d0306c0a844

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=review+and+reinforcement+worksheet+answers'. This URL is presented within the document body, disguised as a link to worksheet answers. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic indicate a social engineering attempt to redirect the user to a malicious site.

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.me/wix?keyword=review+and+reinforcement+worksheet+answers
- https://static.usrfiles.com/ugd/5b604d_4a9acaa07fa34472b595b3200b3604d5.pdf
- https://static.usrfiles.com/ugd/c20ea7_0e25e9dbabcf41809b153d767346486b.pdf
- https://static.usrfiles.com/ugd/2c8d66_568fab222d574f379fc7905fa548a3dc.pdf
- https://static.usrfiles.com/ugd/4bb894_185cd6d4b45f47caac5db49feebef22d.pdf
- https://static.usrfiles.com/ugd/b8c837_9d97030adb904e1da4e1960c69db5cda.pdf
- https://static.usrfiles.com/ugd/8d57bd_22237c9a6a6240f089e029b4f2fa1c2d.pdf
- https://static.usrfiles.com/ugd/b8c837_781a18d74bd84e11ba27ce68396c5e62.pdf
- https://static.usrfiles.com/ugd/cf14a4_00ff9e9a875c43cc8d255f18715d8f0d.pdf
- https://cdn.shopify.com/s/files/1/0434/0842/5123/files/96775017858.pdf
- https://cdn.shopify.com/s/files/1/0434/6635/8934/files/70651245451.pdf
- https://static.usrfiles.com/ugd/760101_4962eb3c387b4025b4ecd73641fa36d9.pdf
- https://static.usrfiles.com/ugd/b8c837_607cf5f478734dbaa885c6cc1aadfda5.pdf
- https://static.usrfiles.com/ugd/8b9728_439d71e22d864ade9c088d7b4482035c.pdf
- https://static.usrfiles.com/ugd/b8c837_f2bf66bbaf7a4b95838343b21e832e35.pdf
- https://static.usrfiles.com/ugd/0cd3a8_ae2e679277e941b484685183241a8316.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_off00006c85.bin` `4c50476bd40fd1f3bdfbff7d37bd7413fc4f81088ac5016e9713081855bd19d5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C85	5452 bytes
`font_01_sfnt_off00007f03.bin` `982f79bae93c8b9edcdeffda96c72038507c26e163dba84255ee19d908ba5621`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F03	10576 bytes

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