PDF malware analysis — malicious · bd7967a690cdc8cf

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 04:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5fed787096e8b45c3bd753ed0f95a8a5 SHA-1: 399deae51c7d91f2866dc56cf94a44714cef8a2b SHA-256: bd7967a690cdc8cf7c3b636e893dfea9ba09b0cc2db88e4e48a6c50619a0fcd4

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=de+la+codependencia+a+la+libertad+au, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to static.usrfiles.com, suggesting a tactic to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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.ru/wix?keyword=de+la+codependencia+a+la+libertad+au
- https://static.usrfiles.com/ugd/b65acf_03e98fcf0d834a3581136d0d66b51cdb.pdf
- https://static.usrfiles.com/ugd/e02969_2cc2826d0c414498b2d8a42d19191865.pdf
- https://static.usrfiles.com/ugd/173616_a4cd952fbdd54d7bb9f6b8e95a738fe8.pdf
- https://static.usrfiles.com/ugd/b8c837_e9d5730f48464529ad166e3f86affca9.pdf
- https://static.usrfiles.com/ugd/b8c837_a3912266a6694ec7a4038ccb1f1778ca.pdf
- https://static.usrfiles.com/ugd/0c41e7_7b8b36bdc2e740fe9612dc2ee38d5e9b.pdf
- https://static.usrfiles.com/ugd/b11f6d_1dfeab2df2f34e6f8c3cfd462a81b1e4.pdf
- https://static.usrfiles.com/ugd/8b9728_e55e0a6989694437ab0b830e062f257e.pdf
- https://static.usrfiles.com/ugd/accd1f_df6840f262fc41bbb2ba9a0b392245b2.pdf
- https://cdn.shopify.com/s/files/1/0430/9699/8048/files/69425164891.pdf
- https://cdn.shopify.com/s/files/1/0445/7860/3172/files/armies_of_legionfall_quest_guide.pdf
- https://cdn.shopify.com/s/files/1/0435/6859/5112/files/57655232752.pdf
- https://cdn.shopify.com/s/files/1/0436/7525/4937/files/sports_news_2020_download.pdf
- https://cdn.shopify.com/s/files/1/0435/1416/7450/files/sadal.pdf
- https://cdn.shopify.com/s/files/1/0434/2297/4117/files/79162758487.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_off0000559f.bin` `51c3b6f25f8ccf1c25f30fe7ccb0e1315a89400949a849c231e5b52e56bde431`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x559F	4912 bytes
`font_01_sfnt_off00006650.bin` `31d19917e2706d2cd5deee1c8cdb5322a49bb07db4601ed6f4a3338c5962dc36`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6650	11288 bytes
`font_02_sfnt_off00008b27.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B27	4324 bytes

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