Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a13210603ea682…

MALICIOUS

PDF

134.1 KB Created: 2020-08-13 21:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b097def0026d947494e9476abb5fc408 SHA-1: dc24ef107a550643a9f16883cbe943efca227dae SHA-256: b3a13210603ea682ffd1b2f31695c866de467fbc7a48323178d3cbdd9633d582
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Worth it full video song' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, further supporting the malicious redirection pattern. The ML_NYX_PDF_MALICIOUS heuristic strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=worth+it+full+video+song
    • http://files.wanderbra.com/uploads/1/3/1/8/131856476/fefubonemet_dijomujizijux_kekufum_nisororinupimej.pdf
    • http://sitigumix.cjx2graphics.com/uploads/1/3/1/4/131406687/1862a17a1275d.pdf
    • http://lovug.mariaverrier.com/uploads/1/3/2/8/132814170/nimir.pdf
    • http://files.leanprograms.com/uploads/1/3/1/6/131637016/xagolidiwod.pdf
    • http://files.arbertasimi.com/uploads/1/3/1/0/131069869/f2e867e92b45.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/tetevonekalafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/pomiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/kuwosegajalefosozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/66595634006.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/70904744563.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/69744025450.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/72580436652.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5790/files/wifamafabusuxunusuvedunu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4344/files/2235200740.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3910/files/cardiac_surgery_complications.pdf
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/85184442714.pdf
    • https://cdn.shopify.com/s/files/1/0434/3585/1928/files/2140521805.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/fsc_1st_year_biology_book_download.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197f1.bin
4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197F1 6588 bytes
font_01_sfnt_off0001a839.bin
d5be49d24545bbfba2dd7bd181a97feade4e3a7faa5c71f249b4e4ed901b6127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A839 6572 bytes
font_02_sfnt_off0001bef9.bin
d1c150a0d942d4e9f994765b44678c3b0d3201cfd182a4d89310163d3399cc05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEF9 5032 bytes
font_03_sfnt_off0001d01e.bin
b30a6e87581070168abf90d4117fea34e8b106bef1a62913c1c9789b041d4be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D01E 2956 bytes
font_04_sfnt_off0001dbaa.bin
28d84b9f040f4ba5c3d184ccec7abc85677f852fccb144e9b1e905820857fd56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBAA 14672 bytes

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