Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0646320cb999c7…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 07:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17ce94bb8d864b74aa9d0463fd6bc1d SHA-1: a0bc390dbc3515bf78981d9f0253abf611c1d2ab SHA-256: ce0646320cb999c7462278443c11634f6f18577e51ef02c7b257c33509f3f844
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 17 external links, including a redirector to a malicious URL. The document body, though heavily obfuscated, contains the text "Tracker software pdf xchange viewer gratuit" and the malicious URL, suggesting a lure to a potentially harmful download or phishing site. 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/wb?keyword=tracker%20software%20pdf%20xchange%20viewer%20gratuit
    • http://diveju.cakesforeveryoccasion.co.uk/uploads/1/3/1/8/131871740/03d1b0c100.pdf
    • http://files.centralbluemountainsgardenclub.com.au/uploads/1/3/1/6/131637074/386f9.pdf
    • http://dufisebo.befitnow.co.uk/uploads/1/3/0/7/130740141/rokawe.pdf
    • http://files.southatlantabirths.com/uploads/1/3/0/8/130814157/79bbe2.pdf
    • http://files.thegirlsatcarolynk.com/uploads/1/3/1/4/131438268/3521284.pdf
    • https://cdn.shopify.com/s/files/1/0440/0935/7477/files/sozidebanasepimubejafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/dedubare.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/grievance_redressal_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/bastien_piano_basics_primer_a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1706/files/xazewabedojiwatinelejalew.pdf
    • https://cdn.shopify.com/s/files/1/0447/8477/9430/files/kamoloruzimenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/noxudibaligozom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/giresofufijenobivu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/vixudonabog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/18488726896.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/molikolifuvelad.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_off000066ca.bin
e791fdffe8c9fa60893b9e741b52cc69f3f2cf2e2ce247001654f12ea96d54f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 5616 bytes
font_01_sfnt_off00007a03.bin
e939920a946e09e0cf1b72a92ea81c26932ecbefd3ac7b1faa30f6d31facdf10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 10444 bytes

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