Malicious PDF — malware analysis report

Static analysis result for SHA-256 f633521df0ef523c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-20 20:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb03f540a4e56475de845b43173568f8 SHA-1: 845280242c0872faedc0041c17985d9b82f0fa28 SHA-256: f633521df0ef523c70d9d16345ab30386d409a061ed3a10d50c5d0e22e20344c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free printer adjustment program. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the link at https://ttraff.com/pify?keyword=printer+adjustment+program+free leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, but the primary malicious link is clearly identified. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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=printer+adjustment+program+free
    • http://xawepur.shandsschool.org/uploads/1/3/0/7/130776819/6fec18fe19ca.pdf
    • http://files.sweetspotstrategies.com/uploads/1/3/1/3/131384340/7641531.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/embedded_linux_booting_process.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/kixaluwa.pdf
    • https://cdn.shopify.com/s/files/1/0446/4040/3619/files/tatalaksana_ascites.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/polukitebevenon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/faxetadekagelomew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/acis_and_galatea.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/linunegufarasatakatonanel.pdf
    • https://cdn.shopify.com/s/files/1/0448/0896/2210/files/causes_and_effects_of_noise_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/ataxia_postinfecciosa_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/54258633088.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_off000058e8.bin
7f3cdbb05243311a79a282595fb31ba4fc3e710a48478795685351b51f5578ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E8 5404 bytes
font_01_sfnt_off00006b35.bin
60d3726f64f454da3b0b17ae58c0f70c19e2ef47c604c5cb9166e8ec7acc7078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 15792 bytes

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