PDF malware analysis — malicious · 1a0ef82fe372a2b5

MALICIOUS

PDF

68.1 KB Created: 2020-08-30 23:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e05b3d4883531f8337d28104551ef697 SHA-1: 08914ec385bec428388e1cf4a41db900a76c8df5 SHA-256: 1a0ef82fe372a2b50247944379c6a5368de509fc912b79395f2a3edf538d81cb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link to 'ttraff.com' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for free movies. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to 'static.usrfiles.com', likely for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=peliculas+de+vicente+fernandez+gratis
- https://static.usrfiles.com/ugd/b8c837_2dfe3cd130d2468e9d7e37d35cffdaf3.pdf
- https://static.usrfiles.com/ugd/69695d_ede9a391f1e143ff9752e0c4cdc0d353.pdf
- https://static.usrfiles.com/ugd/b7ab08_5f0bd78261bd41cfa0b62513cec54886.pdf
- https://static.usrfiles.com/ugd/95089d_b520bfa622524feea7d941297bbb8550.pdf
- https://static.usrfiles.com/ugd/0779a3_54be0fd5bdcf4e1691465062425676d2.pdf
- https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.pdf
- https://static.usrfiles.com/ugd/b8c837_4a4f14071a4c426f88c4eb5238b1e70f.pdf
- https://static.usrfiles.com/ugd/221f3a_e83a630aab414ad08a7aab0cc87df2b8.pdf
- https://static.usrfiles.com/ugd/cafc24_c8887c7fb88f4bb6bcb636e71f043dda.pdf
- https://static.usrfiles.com/ugd/856cea_19caed2a58b544a98deb09135a645782.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_off0000c0a8.bin` `14561aac3a0b0dc2998e2650f5a8f28a40aabd68ab0e83d828b903effdde2c5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0A8	5072 bytes
`font_01_sfnt_off0000d1f9.bin` `e773599388acb8644bb71faa2141214a7862b305611c7e40f671db1f1359eea4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1F9	10896 bytes
`font_02_sfnt_off0000f510.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF510	4324 bytes

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