Malicious PDF — malware analysis report

Static analysis result for SHA-256 8548ab0c81869a78…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 12:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06bd22fa82cd36767821adaf878ec9b3 SHA-1: 57ec452a9a5ebf2af171dd8e566160dab161aca1 SHA-256: 8548ab0c81869a78f34f488f70c579aa93cf5bba064da2859c9aae9879b2b418
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented in the document body with a deceptive keyword. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious redirector URL.

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=genetics+laboratory+investigations+pdf
    • http://files.chinchillaphotography.com/uploads/1/3/2/7/132710784/dudiwimezefi-gukeluxodi-lifikipezufi.pdf
    • http://files.ilovewatervalley.com/uploads/1/3/2/7/132741556/54c3b5.pdf
    • http://files.utahversatility.com/uploads/1/3/1/3/131380592/5323111.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/26897357462.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/rafusopibabilape.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/najolelones.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/pogivagigogetixek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2695/files/definitive_body_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/78623453445.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/zilunovukujonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/89821614756.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/5553267624.pdf
    • https://cdn.shopify.com/s/files/1/0438/1576/4128/files/66689277955.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_off00006069.bin
d8085ea67c63fbc00e8a66391491f015f93b85d12e97eb1ea909ab97b1bfa3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 5656 bytes
font_01_sfnt_off000073c5.bin
7ecadcb113125c275ff49c121e4d8f4c9595d06ef93091511fc720c216d5a1f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C5 10076 bytes

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