Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd1ba80fe36f3f9…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 06:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975a87ef60cf6a24ea69a7b0591366b7 SHA-1: a6adf14f5be463c85d061013f2e93728fa135637 SHA-256: 5bd1ba80fe36f3f94aed198a3eee3160805b5c9c9449d8d2eb5f1def1ce6edb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Clash of Clans' and the malicious URL, indicating a lure. The presence of multiple PDF links and a redirector points to an attempt to drive traffic to potentially harmful sites.

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=clash+of+clans+y%25C3%25BCkle+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://static.usrfiles.com/ugd/b8c837_295d1b478cd3491e9d6f63357d716718.pdf
    • https://static.usrfiles.com/ugd/b8c837_21099e3fbaa543799ab8b1ed93d07c8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f045f1f5c8348eeb9a5d24a90b7582d.pdf
    • https://static.usrfiles.com/ugd/b8c837_17533c3230964082bba0a1d4f4ede558.pdf
    • https://static.usrfiles.com/ugd/b8c837_8acb1d33c0c64a58a6a8bc1a74083211.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f59dcc6f09e496f9b992b449d9a0371.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bce31467cbd47ea8981f461cbed9cf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657b16b46ef4a44aa561a4287601a24.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c6d.bin
6ea1048c354187154607355af3974a75cee1ec511e7310ac97697bc1f1496232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6D 5196 bytes
font_01_sfnt_off00006df4.bin
610bc7a34d9971e6cfb04d2139aee478b09bd8bca1595bfd0b9ce6d0b0c0e110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF4 11528 bytes

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