PDF malware analysis — malicious · 51890ca988e9a3b5

MALICIOUS

PDF

38.0 KB Created: 2020-08-30 14:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 739fa232340f81fd92791eba6da91bd6 SHA-1: 70a888c4b3dcfb7a74777536c9fe7a29ab021c17 SHA-256: 51890ca988e9a3b507d24c0b216380843a0a86153eaa425fc9a4399e3764e9ea

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a domain associated with a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=improving+vocabulary+skills+4th+edit, which is likely intended to lead the user to malicious 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.cc/wix?keyword=improving+vocabulary+skills+4th+edit
- https://static.usrfiles.com/ugd/b8c837_33e95d307d22422cb7e4e662e5282523.pdf
- https://static.usrfiles.com/ugd/52b593_a441a521464b4fdd8c2b484fb7a0f043.pdf
- https://static.usrfiles.com/ugd/b8c837_57218dcf9dc4439c993db971d6dc7c39.pdf
- https://static.usrfiles.com/ugd/b8c837_c8b5fbe519dd4d489f77557477427c74.pdf
- https://static.usrfiles.com/ugd/b8c837_7c8b2143903642f8994781e8bcc85afc.pdf
- https://static.usrfiles.com/ugd/1a89c8_3fbce9bc9da948c7b14eb9f1989f3841.pdf
- https://static.usrfiles.com/ugd/696b8a_75352a4e22384c999bc91452cc4e032a.pdf
- https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
- https://static.usrfiles.com/ugd/b8c837_6e116894d6184ac1bfd4b3303e2beaed.pdf
- https://static.usrfiles.com/ugd/63022f_bbd4ad7f96c148879371d010c299a605.pdf
- https://static.usrfiles.com/ugd/b8c837_73dfdb07c00641189e673e1cfdbd9d78.pdf
- https://static.usrfiles.com/ugd/4bdc6d_609e2ca22856452a9736d205e056058e.pdf
- https://static.usrfiles.com/ugd/ecec20_0537115710e74792b41fbc9340fb2317.pdf
- https://cdn.shopify.com/s/files/1/0432/8688/8601/files/98174120472.pdf
- https://cdn.shopify.com/s/files/1/0432/7328/9888/files/55280679520.pdf
- https://cdn.shopify.com/s/files/1/0436/0588/5090/files/sezipojopuvuxuz.pdf
- https://cdn.shopify.com/s/files/1/0437/6766/0693/files/types_of_bearing_nptel.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004880.bin` `d24f31564e07a2c27d7dad364cab5fc3275073b946f3d50d59e146ced7b3a04f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4880	3540 bytes
`font_01_sfnt_off0000550a.bin` `18697d0f6a9345c063493fda3894aba24ffd6b6f6e16a54f15d09c66a5392109`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x550A	5876 bytes
`font_02_sfnt_off000068e2.bin` `0752cc59735fcb398033c3fa5483aa4a1ef204a7e4cd082b31fc436f69d70ce5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68E2	9896 bytes

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