Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2c49188cc87828…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 05:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e4f1b8dbdcb51adce1cc614ee524669 SHA-1: f2feca197eb5623d173d3b9fd4d265fc5e439a10 SHA-256: ec2c49188cc878287429cf98b4e43338a343ee797505505e70a9d9239de0fa64
120 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, a common tactic for SEO poisoning or link farming. One of these links, 'https://ttraff.com/pify?keyword=few+and+little+exercises+worksheets', is identified as a malicious redirector. While many other links point to benign Shopify URLs, the presence of the malicious redirector indicates a phishing or malware distribution attempt. The document body text is heavily obfuscated and contains the malicious URL, further supporting this conclusion.

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=few+and+little+exercises+worksheets
    • http://files.gagroundcare.com/uploads/1/3/1/3/131382078/3617493.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/brand_identity_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/composite_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/fodojolipadulufexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5293/files/92292750607.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/canningvale_flannelette_sheets_review.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/nuvopumagirugeji.pdf
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/axelos_itil_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/60834827306.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8151/files/63247465592.pdf
    • https://cdn.shopify.com/s/files/1/0437/1896/7450/files/auto_tune_vst.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8229/files/23496322438.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/36031917990.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_off00005b26.bin
f40bb3e61ce233d59308b2291f53c9db8aa4b35fcd24f97b4794f34806da7deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B26 5208 bytes
font_01_sfnt_off00006ce6.bin
37c5548d806464868d2c95efbc17b0e515d55005c56197157b77aed9b8fe2e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 10136 bytes

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