Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc60863f90da594…

MALICIOUS

PDF

64.5 KB Created: 2020-08-31 06:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42e384d3131a419c10c3c96fbdd09a0 SHA-1: f88d6f37cda65c6c26307d45ba6a501e19ad6c7a SHA-256: 7cc60863f90da5940e6928c705aecf8bacdfb1d5efed1fff94410753c753bdfa
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=neverwinter+nights+cheats'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on static.usrfiles.com. The document body, though partially corrupted, contains the same redirector URL, suggesting a deliberate attempt to lure users to this malicious domain. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/wix?keyword=neverwinter+nights+cheats
    • https://static.usrfiles.com/ugd/b8c837_f369167a16424859b507f67f9304f693.pdf
    • https://static.usrfiles.com/ugd/04e6f9_0b2764d3d6cd40188bffeeccb0d339fe.pdf
    • https://static.usrfiles.com/ugd/374ce0_943cc4b2a6ec4722aa79a09875c86eb2.pdf
    • https://static.usrfiles.com/ugd/ae059d_8b4c153ae89d44a197e72f589ac4f2cb.pdf
    • https://cdn.shopify.com/s/files/1/0441/3269/6216/files/36889985284.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/bekatadomajenurebinofi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/38434912937.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/bruchrechnung_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/senakaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/8207344704.pdf
    • https://static.usrfiles.com/ugd/299074_01e6b167c405445a8a8e0046bf7f1455.pdf
    • https://static.usrfiles.com/ugd/5e8de6_d6c9cb2fae864be98ee7ea98a8721a26.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d97030adb904e1da4e1960c69db5cda.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a80e.bin
03dbdaaf9217af42722b252278e05d75b0f4371e57e9b2380be05fceaa6845b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA80E 4828 bytes
font_01_sfnt_off0000b87f.bin
0d1e9c51ef595f777e639affaadf9c06c75602b2268efe49aa9b4b9ca50ce3f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB87F 14800 bytes
font_02_sfnt_off0000e6c0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 4324 bytes

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