Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fba3e8dd5a9496…

MALICIOUS

PDF

51.7 KB Created: 2020-07-30 02:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0582c83bf53a40c86cf4561776f03435 SHA-1: 584c3b5f2176a9d15580460f378720323ecba10f SHA-256: 30fba3e8dd5a94965f02e84f7c06b5f4a695a4fc45cb2b2660df4e89df07b048
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'work attestation'. The presence of a link farm and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful content.

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/pify?keyword=exemple+attestation+de+travail+pdf
    • http://files.compassionanthology.com/uploads/1/3/0/7/130775735/3167389.pdf
    • http://files.adamwilliamchalmers.com/uploads/1/3/1/4/131453645/zerodukegokide_zisif_xibusuroxolalov.pdf
    • http://files.studio-maru.co.uk/uploads/1/3/2/6/132681513/zunosipowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/kixigesixukamemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/8410431830.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/sebutumoxuvobabo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/554586358.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/17139041588.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/50849174229.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/podesigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/badazasosujizemewaxaduse.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/kekiraseku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4242/2440/files/96233696116.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/litofovivovir.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/duvap.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_off000081a4.bin
b9c3ca7fc0408f91260c88a2bf8a35e85f4a5317ae3aee832adf82279ceffbf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 5060 bytes
font_01_sfnt_off000092c1.bin
ff3f21ce57b799b8dd178857e5357c78129bf18200aec17122af449f49f01cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C1 14780 bytes

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