Malicious PDF — malware analysis report

Static analysis result for SHA-256 785f4cdf03e47716…

MALICIOUS

PDF

38.3 KB Created: 2020-07-09 03:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 674b95ae8ba370515bd20f4f37f5b8fd SHA-1: ab8c792968caf264cae9b0191c337eb742c6ebd5 SHA-256: 785f4cdf03e47716ccccb2a2c6fee49ddf025cee9cb683d3d939cdda1a0d576f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of an SEO spam or phishing campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL redirects to known malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links designed to manipulate search engine rankings. No scripts were extracted, but the sheer volume of suspicious links suggests a malicious intent to redirect users to harmful sites.

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.com/wb?keyword=history%20of%20western%20art%205th%20edition%20pdf
    • http://files.ultimatefrisbeenow.com/uploads/1/3/1/4/131482926/2791022.pdf
    • http://files.ferrari275club.com/uploads/1/3/0/8/130813546/fujusojexini.pdf
    • http://files.sheisblankspace.com/uploads/1/3/0/7/130776826/golegudeg.pdf
    • http://files.idagroverec.org/uploads/1/3/0/7/130739315/7532358.pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • http://files.worldreadyschools.com/uploads/1/3/0/9/130969907/palirumopavatej-nitiz-diloxomagusap.pdf
    • http://files.biomedregulatory.com/uploads/1/3/2/7/132741181/mokewax.pdf
    • https://wewerodufo.files.wordpress.com/2020/07/87006359341.pdf
    • https://zixuzutufu.files.wordpress.com/2020/07/kakijuzewopewarizimato.pdf
    • https://resudixam.files.wordpress.com/2020/07/fuxavuzazegakifimezujo.pdf
    • https://sekejodi.files.wordpress.com/2020/06/73846452304.pdf
    • https://mugitemos.files.wordpress.com/2020/06/97584744911.pdf
    • https://tutujored.files.wordpress.com/2020/07/wunikidemaf.pdf
    • https://toxowufusa406561940.files.wordpress.com/2020/07/68623499525.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.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_off000058b2.bin
ca48f55f82aec2f189d36bcc4f87115f892b382f7c30e9b790937258d0c30855
pdf-font-stream PDF embedded font (sfnt) at offset 0x58B2 5164 bytes
font_01_sfnt_off00006a4e.bin
1b35d52bc765b2fd98b9f1a652f646c4e88296abd15fd3a600ab7d0fad79cd29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 9996 bytes