PDF malware analysis — malicious · c7db7d75e176bc14

MALICIOUS

PDF

49.5 KB Created: 2020-08-30 19:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b6faa563f9121fc6d589f76af82bb589 SHA-1: dc0e38947844ac792ed202f4376b7bbb2372f088 SHA-256: c7db7d75e176bc140a8af10a1e152b0dc8199458b79d9769880596edde5322dc

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for downloading a movie. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also flagged this PDF with high confidence. The embedded document body text, though partially corrupted, contains the same movie download lure as the malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=truque+de+mestre+2+filme+completo+dublado+download+utorrent
- https://cdn.shopify.com/s/files/1/0427/7728/0671/files/83159388775.pdf
- https://cdn.shopify.com/s/files/1/0431/2753/7828/files/aes_encryption_and_decryption_in_android_example.pdf
- https://cdn.shopify.com/s/files/1/0433/4285/6344/files/latiludu.pdf
- https://cdn.shopify.com/s/files/1/0437/6897/1421/files/96023511629.pdf
- https://cdn.shopify.com/s/files/1/0433/0926/9156/files/43975659283.pdf
- https://cdn.shopify.com/s/files/1/0436/0791/6707/files/degamixurijef.pdf
- https://cdn.shopify.com/s/files/1/0434/4188/1253/files/25337278180.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
- https://static.usrfiles.com/ugd/bf0735_05409007baeb408e9d2e4e79377bc082.pdf
- https://static.usrfiles.com/ugd/b8c837_23fd4484a92a4616b0e93462d91a9c37.pdf
- https://static.usrfiles.com/ugd/b8c837_dc34892d73aa410796328ad677a3cb17.pdf
- https://static.usrfiles.com/ugd/b8c837_f51bc2012eb84854a7d5e1f9fb98dab3.pdf
- https://static.usrfiles.com/ugd/625844_42a277b403ee4b989c2e60d336a682a2.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005943.bin` `872df3b4a6c49885c5b1aa942ab70b688ffff0cea28021cd1d37a353e20e8e00`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5943	5624 bytes
`font_01_sfnt_off00006c48.bin` `40363f435dbc4d160b98cea529a6f45cd2a0e6c90775320528852ed1b0bc2488`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C48	12816 bytes
`font_02_sfnt_off00009363.bin` `e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9363	16092 bytes
`font_03_sfnt_off0000a82b.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA82B	4324 bytes

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