Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb489aea56a2527…

MALICIOUS

PDF

38.2 KB Created: 2020-09-10 11:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0695211af8facad18046d6094366ce62 SHA-1: 9de9d9f3f2894634e2a470d37c30c394f9ed7eaf SHA-256: ffb489aea56a25275ed4f3dfaf75826052abad2aac88c4895d9cdba73c63e9dc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector, suggesting the primary purpose is to direct the user to malicious infrastructure.

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.link/wix?keyword=grammar+worksheets+for+class+10+icse
    • http://jupuvup.ww.macpainter.com/uploads/1/3/1/1/131164250/4419763.pdf
    • http://vepivel.priscillecanivet.com/uploads/1/3/1/8/131857054/ed5e15.pdf
    • http://gavurimuv.sig10-cleaning-decontamination.net/uploads/1/3/1/4/131453501/73f0f3310d.pdf
    • http://katufu.osceolacustomwoodworks.com/uploads/1/3/0/7/130740178/pabup-faserumeru-wapepevuzulofe.pdf
    • http://sovatusaj.studio135onlinestore.com/uploads/1/3/1/3/131378776/7371868.pdf
    • http://tijub.new-england-marketing.com/uploads/1/3/0/7/130739756/1390851.pdf
    • http://files.tricountypullersinc.com/uploads/1/3/2/6/132696249/e0f81288.pdf
    • http://files.ppjass.org/uploads/1/3/1/4/131453194/1104935.pdf
    • https://static.usrfiles.com/ugd/07625c_0bf70d03927b4f79876169114d6e740d.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_5208536179514c808b4cfc0a56f31eb1.pdf
    • https://static.usrfiles.com/ugd/f46427_e850800d8ed0497492d805b5698d472c.pdf
    • https://static.usrfiles.com/ugd/7d2910_3b130f8fb632442ebd9482ee8f171769.pdf
    • https://static.usrfiles.com/ugd/90423f_bcb8bd2d3f5a4a95bb5fa4a7795de1cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b86ad344d73a4a869059bbfbdf53c55a.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_off00005734.bin
660c2cb18b6c5246ffe2ae1ba597ceedf4d435184b9f84429f046b96a7a23fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5734 5504 bytes
font_01_sfnt_off000069dc.bin
5faeaf36e3c14eeb86bb8230e97834ed19042861ff92d36daf13e5680bdcf2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 9980 bytes

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