Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c81c942a1270543…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 19:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c390766f649a17cf9543bb315c47fe79 SHA-1: 7517d5f141913e7816b96e4299181665f8d2ece2 SHA-256: 3c81c942a1270543dda1d24183e010e87630a61d94975460028c0eb02d7ed3b6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=google+chrome+app++for+jio+phone'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same deceptive URL and a list of other PDF links, reinforcing the attack pattern of luring users to potentially harmful sites.

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/pify?keyword=google+chrome+app++for+jio+phone
    • http://kexepikak.stbrigidstaugustinepartnership.org/uploads/1/3/1/4/131437622/d81b3f036da2085.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/voxeretanuwisojiwunera.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/fuzafil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/44445362645.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/47792196782.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0285/files/jafojelinuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/75642066075.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/72988390355.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/19615311503.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/16592079033.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/pujogufotibis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/99881348791.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_off00005d55.bin
ed96b0e79b814121e9f91cba155bb9762bda43b4807dd83e3e19dd96139f7494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 5360 bytes
font_01_sfnt_off00006f7a.bin
7f724d5d5f1f901bd08ab3cbec4e2b0650f895868cbef63ed4ab6c17c41a5b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10280 bytes

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