Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6e1085eab5994b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-18 20:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed9ac796ad6220d9cb65e35d20d4ac5 SHA-1: f8e67008cd1a16ffe7bdb8b784515c66f034ac66 SHA-256: ac6e1085eab5994b12c2ab3fb65d1cffec85056fff5d563ea87e581165bab834
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a lure for free game content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the URL https://ttraff.com/pify?keyword=boom+beach+free++apk as malicious. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify domains, suggesting a link farm used for SEO poisoning or to obscure the final malicious destination. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

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=boom+beach+free++apk
    • http://fadajidi.npmafc.com/uploads/1/3/0/7/130739579/zugowawamaba.pdf
    • http://files.uuchurchofthelakes.org/uploads/1/3/0/7/130740517/6449860.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/worogadanisubugutitedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3128/9256/files/86935400927.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/xotil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/wijisixelepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/nesonuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/oxford_gym_reimbursement.pdf
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/54058375928.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/13010783264.pdf
    • https://cdn.shopify.com/s/files/1/0432/9927/4916/files/amicon_ultra-_15_centrifugal_filter_units_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/92146016566.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/nulitufixopekege.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_off00006499.bin
a908954a29513a7a0f6fb9e34301862252fb089e02553859962f47853f325eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 5296 bytes
font_01_sfnt_off00007680.bin
61c4e9705f646f14d842f841d0db0f265cc25ab0baa7923f14f9bbfad0c4c83a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 10528 bytes

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