Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d6bd5ef0afa346…

MALICIOUS

PDF

50.4 KB Created: 2020-08-10 03:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bb03f8cee5bed7eaf9ac886e9fb335c SHA-1: 81df7a03edc7226f124e223e968bc2b621a66e71 SHA-256: f8d6bd5ef0afa346e292607b7abb39612d3c8aa91a4c75f486a9b47556fe95c7
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document is designed to lead users to harmful sites. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic and the document body containing a title and a call-to-action phrase further support the lure-based attack pattern. No scripts were extracted from this sample.

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=mastering+the+mix+reference+manual+pdf
    • http://files.lora-gray.com/uploads/1/3/0/8/130814636/04e4812.pdf
    • http://fasex.kisch.info/uploads/1/3/0/7/130775403/4322976.pdf
    • http://files.longviewarcsociety.com/uploads/1/3/0/9/130969535/837f96dd037d0.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/administracion_de_recursos_humanos_dessler.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/66174057393.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/35204080723.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/86789898489.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/58942586213.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/lukikupemif.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/nuvobirefuvejenibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/fadonatane.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/35708451631.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/mikenapenulupet.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/1162640598.pdf
    • https://cdn.shopify.com/s/files/1/0434/3280/4504/files/zofokexepadiguz.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_off000086b4.bin
3addb915cdaf838df206d4b162443f20d53450f94249c4c94851513126b9be52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B4 5644 bytes
font_01_sfnt_off000099cf.bin
517749a5f2c6ef0b0a9a54c493558a5929bf9649b26cb48e48b6159bf3834d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CF 10112 bytes

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