Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1c3e02657daa9d…

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 08:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e6fb78f9767a73043626b6fbf66bb81 SHA-1: b2a4ed2bf3c4ce7a7f26c8d2aca45a4c1afe2db0 SHA-256: 5a1c3e02657daa9dbeeeeff41826b05fe968873743ea140950c3270457b6037d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and appears to contain the malicious URLs, suggesting a lure to external malicious 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/wix?keyword=mostafa+al+badawi+pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/38428770938.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/rijulitapolale.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/78985469414.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/petavebinanuminun.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/wefizobobekapetinivevavod.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/ridopaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0464/6132/1384/files/nios_admit_card_2014_10th_class.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4035/files/sexafagififeduzu.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_off000047ea.bin
c1d27c7a1d44a31e6314241ce8c6d1ce3603df14fdb797b57575c796661d750a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47EA 5176 bytes
font_01_sfnt_off000059ac.bin
c91858dc1abdb374d5ec5a00812d63b8195e59a3fa15ca05005bc7fc36fa7c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AC 15244 bytes

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