Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39b4b2c039ae860…

MALICIOUS

PDF

35.7 KB Created: 2020-08-09 06:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc3387ffc8192a7e89aa6e9bc5817e4e SHA-1: df99110794ba69f37348e28e3e4b411d38fe9d22 SHA-256: d39b4b2c039ae86020ee47dd34ca07d95abe906c12220f2a086bade824846321
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a tool to convert PDFs to Kindle format. The PDF also contains a large number of links to various PDF files, likely for SEO manipulation, with one such link pointing to a Shopify domain. The presence of a download button lure further supports a malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=change+pdf+to+kindle+format+online
    • http://files.bridgewaterpc.com/uploads/1/3/1/4/131453230/gujisugo.pdf
    • http://jubedetu.wiltshirehockey.co.uk/uploads/1/3/1/3/131379578/jewajetajifizefa.pdf
    • http://files.alsoyouth.org/uploads/1/3/2/6/132695730/7718950.pdf
    • https://cdn.shopify.com/s/files/1/0434/3824/3996/files/abramelin_squares.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/latte_art_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/boolean_algebra_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/87218489971.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/badopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/taxukiperogel.pdf
    • https://cdn.shopify.com/s/files/1/0440/6919/1832/files/vmware_workstation_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/fodikatofupaxolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/what_is_a._js_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/kefawizafazug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/tiremexotusunifam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.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_off00004dc9.bin
e19972ff5d45068e49c1f61492fb0c85adfd528f2a06960b4e1b90b7f926d8df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC9 5244 bytes
font_01_sfnt_off00005f75.bin
2d6b1e97006fb3ce8cc2e774d57299422dd94c9208ced489e4b9324a2d704545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 10060 bytes

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