Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2212e52b94ba76…

MALICIOUS

PDF

53.1 KB Created: 2020-08-30 01:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4183231a83e8f2d4fafda413fa6dd02 SHA-1: 29b6efb10f590e5ae407cbb4a751a016c382dbd8 SHA-256: 1a2212e52b94ba763b92c6e5a1edbea5708606c662b434dc93d6002ef7011512
152 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 SEO-optimized PDF files hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=call+of+duty+ghosts+cheats+ps3+youtube, is identified as a known malicious redirector. This suggests a tactic to lure users to malicious content through a deceptive link farm. The presence of obfuscated content and the ML classifier's high confidence further support the malicious nature of this document.

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=call+of+duty+ghosts+cheats+ps3+youtube
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/megasudoxemaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/39734192315.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/81313069273.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/fosibusewojujon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/supernatural_book.pdf
    • https://static.usrfiles.com/ugd/1decf9_ca136fc578ed4895a89072c6cbcd62ed.pdf
    • https://static.usrfiles.com/ugd/735189_451c040bd8fd494cb66a3d4e40acd6df.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f19b026a2444fb8a703bc85c9544f80.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd81dc27d2d4ab3a7601226f188ad43.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc31f4d6b524514a431ef7b2747371e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009297.bin
38ce1324a52239c08969df87d961b5179d36910fb5d434cc8e8924129753b4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9297 5632 bytes
font_01_sfnt_off0000a5ca.bin
371c3c9294afb7510654655681d0c1a4dc1910ca8daf89e4da0c06db3fc335ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CA 9968 bytes

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