PDF malware analysis — malicious · 21bfbc71c80670de

MALICIOUS

PDF

40.5 KB Created: 2020-09-02 02:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 562d5c6d06709f7b865cc729b3dfb438 SHA-1: 57316bf391b79baee759aa381275c40f9c52f0f7 SHA-256: 21bfbc71c80670de3d6d85ed97fba98666651a55d42a6767caf46fe99d184fd2

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an algebra worksheet. The document body and embedded links further support this by referencing factoring trinomials and providing numerous links to PDF files. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a malicious site.

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/pify?keyword=factoring+trinomials+worksheet+algebra+if8762
- https://cdn.shopify.com/s/files/1/0438/2585/6662/files/faderojerupedamov.pdf
- https://cdn.shopify.com/s/files/1/0439/0053/4952/files/nejozomakaziditu.pdf
- https://cdn.shopify.com/s/files/1/0431/9051/7917/files/tamilrockers_telugu_movies_free_hd.pdf
- https://cdn.shopify.com/s/files/1/0433/4757/4943/files/nowog.pdf
- https://cdn.shopify.com/s/files/1/0436/1755/0499/files/slavery_in_united_states.pdf
- https://static.usrfiles.com/ugd/ea2f88_49a213a15e104b06bf726dee62195812.pdf
- https://static.usrfiles.com/ugd/8e1900_9c5a2bfb09404b36bd6f2320a95af8fc.pdf
- https://static.usrfiles.com/ugd/e4bc37_3a48a6b5ac1447d2b4b06ca9b0bda97f.pdf
- https://static.usrfiles.com/ugd/10e3af_952e3cdb69f14de7ab134038a8db3297.pdf
- https://static.usrfiles.com/ugd/aec2ea_9a21b8de1e7a4275aa7e9667e6ba7fbe.pdf
- https://static.usrfiles.com/ugd/b8c837_794924bd2501441fa6219088ae1e30bc.pdf
- https://static.usrfiles.com/ugd/4117a9_cb7330f131c84e4882d89ed8b20b201c.pdf
- https://static.usrfiles.com/ugd/cafc24_3c00d1b9b62f479eb3cfd00a5be0ea50.pdf
- https://static.usrfiles.com/ugd/b8c837_b7567d631f994d1c92a30438b87d2f49.pdf
- https://static.usrfiles.com/ugd/a18aa6_e273b4f5ae474ba5aeb675e7abd25967.pdf
- https://static.usrfiles.com/ugd/ee9d3f_8fbeb608df6447ccbebbe8140ca87fd3.pdf
- https://static.usrfiles.com/ugd/b8c837_e04cfbe82eb043ddbcb5868b31569016.pdf
- https://static.usrfiles.com/ugd/739437_8168157120a94487b7ca011758eacbcd.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_off00005bd4.bin` `1e74d8bda5a8ad5fc2374a0aebd8cd111ca48a4e5f08aa34dd23e3e554d007d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BD4	6108 bytes
`font_01_sfnt_off00007091.bin` `95ddbf528e201747ea1e263eeeea6911b7bc99a358d44d4069a98965a6457653`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7091	10096 bytes

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