PDF malware analysis — malicious · f5a5638993504ea9

MALICIOUS

PDF

50.4 KB Created: 2020-08-31 09:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bf0dd0c9b88a73dbcc19a8f119bf7dfe SHA-1: 929bb61b34bae815f2eae16ff2fd46fa2e4817e4 SHA-256: f5a5638993504ea9ba8b8819c6453eb24a1634e752a8bd7e88befd5c7649457f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The primary attack pattern involves luring users to a malicious site under the guise of a music download.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=descargar+musica+de+conjunto+primavera+perdoname+mi+amor
- https://static.usrfiles.com/ugd/538d67_e984177f75444a298b996fdaaee779f8.pdf
- https://static.usrfiles.com/ugd/b8c837_20f2a63ed025432e8c3b46eb407c12ee.pdf
- https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
- https://static.usrfiles.com/ugd/b8c837_04df39916c0448b7893174574e4d757d.pdf
- https://static.usrfiles.com/ugd/ddb60a_f6317e139e8d4acc9f9b4b5eee99a330.pdf
- https://cdn.shopify.com/s/files/1/0428/8980/5983/files/2605681356.pdf
- https://static.usrfiles.com/ugd/de60da_fd8b374967ed40a6b019a9d0084b9eb9.pdf
- https://static.usrfiles.com/ugd/26938b_2ec9f80825504625b11dd757f6470fa3.pdf
- https://static.usrfiles.com/ugd/44b221_e3c1cc0aa16d450194ed45611b6bf557.pdf
- https://static.usrfiles.com/ugd/b8c837_69d46a86d57242f8bd80074e665adb88.pdf
- https://static.usrfiles.com/ugd/dad90e_f0aff1d2bf8b4efa844d4baf4ae94fc1.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005797.bin` `0b365745720ca73e2bb386e42d23d6a39540d306677cb93f8b9f3532102f82db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5797	5376 bytes
`font_01_sfnt_off000069c7.bin` `1b46d5bc4fdbf0d6fe8c63cd43ee594182eadc69f4e4c2f28049411ad73c8202`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69C7	1792 bytes
`font_02_sfnt_off000072a0.bin` `2ef69c6933a83ffb5382b430112b278ba372e3b3db24af6347ca74e0fb80e8b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72A0	11132 bytes
`font_03_sfnt_off000096f8.bin` `5f2d20c4381ad763ff9978e9dfd2c0bd65828dc6241a57e471787986de9f958f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96F8	16580 bytes
`font_04_sfnt_off0000adc1.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADC1	4324 bytes

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