PDF malware analysis — malicious · c7f36335cb2b95c6

MALICIOUS

PDF

52.4 KB Created: 2020-09-02 03:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3c3ae8a112b05007fe002cb5c9e6e82c SHA-1: df68cfc7655de96ac0047dacf186fe83cbd7d4cc SHA-256: c7f36335cb2b95c638df524c22dfff2853c1a5ff540b56b77147456efff22045

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, https://ttraff.cc/wix?keyword=humoresque+cello+sheet+music+suzuki, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the intended lure. The file's purpose appears to be directing users to malicious infrastructure under the guise of providing search results.

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=humoresque+cello+sheet+music+suzuki
- https://static.usrfiles.com/ugd/57c819_964f11cb26394c268fad038d2a326577.pdf
- https://static.usrfiles.com/ugd/0511f5_c6624957fa684898b4177faeb398a50f.pdf
- https://static.usrfiles.com/ugd/4b7290_e354840b06614ac691d834a21c51d136.pdf
- https://static.usrfiles.com/ugd/b8c837_971cae0d2cc5406592ac830d7adbe1f3.pdf
- https://static.usrfiles.com/ugd/74e905_48ec4fbafa4f4bf4a7aea9ec09071e1e.pdf
- https://static.usrfiles.com/ugd/b8c837_d59cec74088c4297bda894a3449ecb75.pdf
- https://static.usrfiles.com/ugd/f14cf6_40bc07f5991a47c9933be749d81359b4.pdf
- https://static.usrfiles.com/ugd/b8c837_d02565b90b3543549f637965b7eae96a.pdf
- https://cdn.shopify.com/s/files/1/0435/5407/8871/files/21525949570.pdf
- https://cdn.shopify.com/s/files/1/0462/7352/7959/files/2316577435.pdf
- https://cdn.shopify.com/s/files/1/0433/0097/8853/files/dunizapifofugu.pdf
- https://cdn.shopify.com/s/files/1/0434/6196/8025/files/texezosawumitusa.pdf
- https://cdn.shopify.com/s/files/1/0437/0091/2278/files/toyota_verso_service_manual.pdf
- https://cdn.shopify.com/s/files/1/0435/4863/9391/files/the_raw_shark_texts.pdf
- https://cdn.shopify.com/s/files/1/0462/8945/3217/files/23918035375.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_off00006eb3.bin` `b923a403f5b66298b86933dde77a3942f70876866b0f625b1a8b958749f845ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EB3	4804 bytes
`font_01_sfnt_off00007f14.bin` `78c7349cff120f84330a615b9c24c17e7a93ba481bbb8ac16d3a3cb08b32f891`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F14	17208 bytes
`font_02_sfnt_off0000b432.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB432	4324 bytes

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