Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff56024cbb8a75de…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 17:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8df5341d964952081231b43b7a3cf42 SHA-1: dc82a29668fd0827949df996b06dcf20561381d0 SHA-256: ff56024cbb8a75de78c18264f8d243f596fd4e3db9b9fb56e7c750b37537f90a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'Blender models for' and the malicious URL, suggesting a lure to a potentially malicious site. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=blender+models+for
    • http://files.rosalindstefanac.com/uploads/1/3/2/3/132302802/xawavo-wupopopowipik-vomaguxasan.pdf
    • http://files.capoeirapetaluma.com/uploads/1/3/1/3/131383510/8848668.pdf
    • http://files.ianjkeddie.com/uploads/1/3/0/8/130874207/besosolexiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/sudividijowixiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/tupozawibupukurudepil.pdf
    • https://cdn.shopify.com/s/files/1/0438/9414/5176/files/mathematics_project_work.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/34760321723.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/types_of_blood_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/62031453080.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/zezedusipiwafaporiro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/periodic_system_of_elements.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/netidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/gungeon_baby_good_mimic.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/nesulo.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_off00006df5.bin
bcb19f584658e78bafd4b8b86568f734d07a2fbc246a3050daa34da2c886d8f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 4892 bytes
font_01_sfnt_off00007e84.bin
51d8faf132d1241aa0917bac11eac9cc355cb0af1b9e068f45b2cbc96114614c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E84 10340 bytes

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