Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80e9750939a35ac…

MALICIOUS

PDF

62.7 KB Created: 2020-07-22 07:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be04f4b1702cb74b6cc41e1f62827fb2 SHA-1: 4bb636c51b1e0d27c0f250cb5e803df821bfbf9a SHA-256: b80e9750939a35ac1f0ecb61b96b4284d6a554ca4c3857a6b5f7d5a6ddddf9ce
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at 'ttraff.cc', which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended content beyond the lure of IELTS materials.

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/wb?keyword=makkar%20ielts%20speaking%20cue%20cards%20pdf%202018
    • http://files.joscorah.co.uk/uploads/1/3/2/6/132682785/96f8b.pdf
    • http://files.theconferencereview.com/uploads/1/3/1/4/131438190/basuxamoriladatawed.pdf
    • http://files.erinumc.com/uploads/1/3/1/3/131398366/xofipipefezore_mufofemuxi_xemaperax_jilivaguzola.pdf
    • http://files.amymhanson-eportfolio.com/uploads/1/3/0/7/130775249/7508621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fejekav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/46323278291.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/28548591858.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/19033470518.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/daleguma.pdf
    • https://pisikirapuje.files.wordpress.com/2020/07/goxatanoweboxirapexaret.pdf
    • https://pemaxoxufijo.files.wordpress.com/2020/07/10654022207.pdf
    • https://wekekikozet.files.wordpress.com/2020/06/nuduxowu.pdf
    • https://guxikafu.files.wordpress.com/2020/07/riretexumokaje.pdf
    • https://fuparola32581437.files.wordpress.com/2020/07/zurokutovaremesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/bikewesupozar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/36131628260.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/54627121354.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/jixakaxeri.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/patemisaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/47957803045.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_off0000b78a.bin
1f5f04f99ab7304d784d0400c293744d00eaf0ff8354f1a2fefdcbdb8681a655
pdf-font-stream PDF embedded font (sfnt) at offset 0xB78A 5684 bytes
font_01_sfnt_off0000cafb.bin
c065a610f443174082825f38493bc906ec02f92088135a7be3f69cf7efce2afc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFB 9784 bytes