Malicious PDF — malware analysis report

Static analysis result for SHA-256 7264a359dda65d0e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-03 05:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d7f10950eac80815fd92196de5284be SHA-1: 7937ebf7296800bc9ada1da4c0a7f0fe512f2ab5 SHA-256: 7264a359dda65d0e48d2abc9d9c34bec83c53eb64a86ed094ae010611ddf5ca3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, disguised with a keyword related to 'minecraft stone fence'. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=minecraft+stone+fence
    • http://files.bofc46.com/uploads/1/3/2/7/132712251/sixageregijap-sutixavilefuzu.pdf
    • http://files.souderlandscaping.com/uploads/1/3/1/3/131379037/jatudemow.pdf
    • http://fitetil.arf-private-investigators.com/uploads/1/3/1/4/131438539/vogiwoginuguf_bipito.pdf
    • http://files.teddybrighton.co.uk/uploads/1/3/0/7/130739850/tugebuwibokosilujogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/zenebovowif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/69279320093.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/deforusezigonakulile.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/pavasudufula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/xuwoko.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/19512197618.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/8049380298.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2168/files/95264232521.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/misguided_angel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/fazidafuxonixobosep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/someone_like_you_tab.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fd5.bin
6f8cabec32395072a9799e76a24860d2b34bc96260c6958546e29c5572cfcd45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD5 4848 bytes
font_01_sfnt_off0000906e.bin
ba106644f50a3c313d47e634f8fe3003c6dc15cd51d41412191692a9a19e0367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906E 11388 bytes

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