Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd84114b0f71895…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 14:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4afa1a8c502c4da3be400f08a414b61 SHA-1: 6061716ac730146fe81a199c971804b6eb62b864 SHA-256: 4dd84114b0f718959e0874d3499d92a1897e3fae30d1a694570fc057a887fc47
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link related to downloading a PS4 emulator. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to a known malicious URL. The ML classifier also strongly indicates maliciousness. The document body contains the malicious URL and other links, suggesting a lure to a potentially harmful download site.

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.ru/wix?keyword=download+ps4+emulator+for+pc+full+version
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/xejidixex.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/82555884674.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/95949226305.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/articles_exercise_for_class_5.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/18902103412.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb75d11265aa45b1b0b60703d289c4e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_64de621cdb564b77aff62e1b0d735566.pdf
    • https://static.usrfiles.com/ugd/b8c837_758c2b7f06cc41bfa13a33e69335c60d.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/save_website_to_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/fataxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/belopawopilepuzaladelekas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/fobemumimevemusegerubi.pdf
    • https://static.usrfiles.com/ugd/b8c837_12989437c7b045778bc8d97e3161f556.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b9d02e285a54026bd3ac5b8948e1543.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ac85aa85a6c4456be04a1ff789b1937.pdf
    • https://static.usrfiles.com/ugd/136d07_98ddfdf1a1d0469d88b875b314c3dc1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_123be7c729f94a5a80583c06f60cd9c1.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/
    • https://static.usrfiles.com/ugd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074bd.bin
e37fa78cc11691ddc4b3d9713c16ee195233808a47bbf8e69f8a662044375ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BD 5540 bytes
font_01_sfnt_off000087a1.bin
10b1c179d725537b3a75a7a54d15555e66f5d1d3f4ad80285dcca1d52629e7a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 10420 bytes

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