Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33f7aed790fc544…

MALICIOUS

PDF

35.1 KB Created: 2020-08-23 12:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8484e8229daad41c282f1c30e9af4470 SHA-1: ce990d7aeaeb9c4829012d41e9ddd4a9ffd57c26 SHA-256: e33f7aed790fc5444edcec3a357ef49fb668d87287fe230c40305cf51c278999
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 a link farm hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=unstressed+vowels+in+polysyllabic+words+worksheets, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.ru/pify?keyword=unstressed+vowels+in+polysyllabic+words+worksheets
    • http://files.icedhockeyonline.com/uploads/1/3/1/1/131163859/9019509.pdf
    • http://files.wlcbands.com/uploads/1/3/1/6/131607712/2769e0d94.pdf
    • http://files.brookesonsphotography.com/uploads/1/3/1/4/131438692/2a7385047.pdf
    • http://files.ojaivalleymuseum.org/uploads/1/3/1/1/131163932/9431274.pdf
    • http://files.steveslawnmowersales.com/uploads/1/3/0/7/130739835/zarubelewugubal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/74518922359.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/android_auto_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/lucky_jason_mraz_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/1029104740.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/soxuvuxosakaruseso.pdf
    • https://cdn.shopify.com/s/files/1/0454/6071/7726/files/fumogovaremebad.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/33175100533.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/pezedinuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/14806613586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/35580829521.pdf
    • https://cdn.shopify.com/s/files/1/0450/7097/5128/files/xubatebilimizekexixiguzit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/rasawuzaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/poland_zip_code.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_off00004c52.bin
188f035f322437159dbd7dff57010e55f72964466c59ed569dc81d47c40e89db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C52 5608 bytes
font_01_sfnt_off00005f6a.bin
3e2d8c02d3334a535ec2fbc3b1fc1c181df181ce4969b7a4cd8404d00eac88da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 9260 bytes

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