PDF malware analysis — malicious · 45aacfae25420383

MALICIOUS

PDF

43.2 KB Created: 2020-09-06 11:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7a70c6520fc8d4e69e0fd603fdd62a45 SHA-1: af92b06d89d185661adfd3e519865819e8f26437 SHA-256: 45aacfae25420383dd01e3ffe75d234f58eb5ed7a819807bc3c80b637b2ecaf2

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=interjections+worksheets+for+grade+6'. Additionally, it exhibits a PDF link farm heuristic, containing numerous external links, many of which point to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to malicious infrastructure under the guise of educational content.

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.link/wix?keyword=interjections+worksheets+for+grade+6
- https://static.usrfiles.com/ugd/5fd5c1_bd4569c0ec2140949bf1553b820da8d6.pdf
- https://static.usrfiles.com/ugd/760101_27b286a565bd474ba18d688c9ba2a327.pdf
- https://static.usrfiles.com/ugd/e42ee3_c5d8c1a4a03d4835b621e94ed71fc5d2.pdf
- https://static.usrfiles.com/ugd/e6092c_b6ef0875af5e433b833fe6da1689abd1.pdf
- https://static.usrfiles.com/ugd/d5d855_df8db993710f4ccfb7c9813652fdbcb4.pdf
- https://static.usrfiles.com/ugd/1e8759_03debc50084345cfaae89cb878667844.pdf
- https://static.usrfiles.com/ugd/5c8b2f_dc22b2dc639f4b368c4ba7213ed50ab4.pdf
- https://static.usrfiles.com/ugd/529385_fe581bcc16304cf88945d44e4fd93d53.pdf
- https://static.usrfiles.com/ugd/b8c837_66acace23f7948cab8c857045f26fa7b.pdf
- https://static.usrfiles.com/ugd/e5412a_227c9afbcfea406dab8a32433c51aebb.pdf
- https://cdn.shopify.com/s/files/1/0436/7941/6473/files/python_convert_bytes_to_string.pdf
- https://cdn.shopify.com/s/files/1/0430/8910/0951/files/82551594172.pdf
- https://cdn.shopify.com/s/files/1/0428/9236/1887/files/bozimudekazojozikovirivos.pdf
- https://cdn.shopify.com/s/files/1/0429/0691/0876/files/gugozinekabidu.pdf
- https://static.usrfiles.com/ugd/268ab1_2ccd2f1ba10043728aec6af1472ea035.pdf
- https://static.usrfiles.com/ugd/38eac1_f4680673f6ed49ab85e999090728643a.pdf
- https://static.usrfiles.com/ugd/db1da1_31778f3b8ada40029d5ad58a638b0812.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_off000069e9.bin` `a6fece2b6c06a26fc9b23f94a30f2e2175c4f997686d644163b88f839c89c2e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69E9	5576 bytes
`font_01_sfnt_off00007cf2.bin` `3aba8e1ce78264688b6e330d59637a8d7dcfa92c2ce88c22d5e6ff6d7a32e4a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CF2	10244 bytes

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