Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06e6d2492c12a3c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 03:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faf2956c2b0bb6054dbc0625edfe379d SHA-1: 1486a6a52d37d5f935d06ac8a6e89e3c58e109ff SHA-256: d06e6d2492c12a3ca50b8bf8a48e3402592384d979e7effc06cbf906223867a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link disguised with a popular media title ('Attack on titan episode 29 english sub') that redirects to a malicious URL. This suggests a social engineering tactic to entice users into clicking the link, likely leading to a phishing page or malware download. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link further supports this assessment.

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.club/wix?keyword=attack+on+titan+episode+29+english+sub
    • https://static.usrfiles.com/ugd/cfa91a_841a93848b104e688388b4a4d21325c8.pdf
    • https://static.usrfiles.com/ugd/429b25_f0703aba73c743ae91fcee3d8c039382.pdf
    • https://static.usrfiles.com/ugd/9c0842_1802faf22cf742a9b9e01df2a9fd66c9.pdf
    • https://static.usrfiles.com/ugd/c0b427_af1739c1d013488880c26989744cf861.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/16486319641.pdf
    • https://static.usrfiles.com/ugd/565485_2bc6447929954eb59c86886e30723ab5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b1dfd6d6114ce8b32bf57ca8cdb3b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9206ff5704034970ae2cd0bd5313bff3.pdf
    • https://static.usrfiles.com/ugd/b58d21_acfed04547db4967a400e1879030121e.pdf
    • https://static.usrfiles.com/ugd/daca0d_5bae562df19a4ed8924762270aa6e400.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_off00006b42.bin
9fe57d3ea5de3c78e4592e1c876e3e12718a657480c40a60d0a1d8c8f5ac372b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 5720 bytes
font_01_sfnt_off00007eaf.bin
683e3ac0e67686c3fa53bee16e768742fb1b45a48fab5f9243ca123e0b3af9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF 13196 bytes

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