Malicious PDF — malware analysis report

Static analysis result for SHA-256 68369a35f58297d4…

MALICIOUS

PDF

33.5 KB Created: 2020-09-01 00:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574797c4e50188ffd9db74c927367fda SHA-1: 4c9fbf7616421b5436bd81dfc2ccce04e16ad828 SHA-256: 68369a35f58297d460b6ed9bf1d8c0df64a942da4e5a2cb4b4f96a99bbcfee6f
154 Risk Score

Malware Insights

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

The PDF document contains a link farm and a redirector link to a known malicious domain, suggesting it is used for phishing or to distribute further malware. The ML classifier strongly indicated maliciousness, and the embedded URLs point to suspicious infrastructure. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=3d+touch+iphone+5s
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3ed1f_9e800e09a04e4de8a3a2b8b1a5ed29f9.pdf
    • https://static.usrfiles.com/ugd/0adedf_3ff5aaf2a3134973b8e0000c39b23c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_b556b6a3dcc648a1869f666da74c7f8d.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3221/files/32970973982.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_547df0b621e849c58128ca80249a0c9a.pdf
    • https://static.usrfiles.com/ugd/c20ea7_6255ae8fcf304838b1c4b7279e4790e7.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/tojadosovataxonojotin.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/fubazukoxokoso.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_off000045cd.bin
2088fb535d78c58199334b55f3a8fee30c93f375ec940dcfcc4deedeb65a966a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45CD 5016 bytes
font_01_sfnt_off000056e6.bin
dee29db04796b69c1e021df98c7fb3018aaad382d340310d83876861eb3450c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E6 9840 bytes

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