Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74f8eae734f6cb0…

MALICIOUS

PDF

48.0 KB Created: 2020-08-02 14:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49f847b1232f8265677bf2a8339516a1 SHA-1: b8ba5e11a88366c06625478c64eef47b42cd678a SHA-256: d74f8eae734f6cb0f0614afe4c2411d04b3e474a152f2f5d0cdaf0951e558a95
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links points to a known malicious redirector. The document body contains garbled text and a reference to the redirector URL, suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious activity appears to be link-based redirection.

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=bis+warrior+classic
    • http://files.forthestudentsuh.com/uploads/1/3/1/8/131856877/wizelagimuzepib.pdf
    • http://files.nanosc.se/uploads/1/3/2/7/132740435/7586498.pdf
    • http://files.spiralingupsolutions.com/uploads/1/3/0/9/130969746/a762122f.pdf
    • http://files.yokko-online.com/uploads/1/3/1/4/131407958/a317f6cc88a00.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/96656416384.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/84280218586.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/68874293911.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/72732107855.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/5830350801.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/international_macroeconomics_feenstra.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/vupunelowegisopelerumun.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/12875161256.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/xineb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/fifalum.pdf
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/reddit_pixel_porn.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_off00007578.bin
910a64e17fac66e9acfde7fc9bedcedc8408c6f4ff3153b5da4f3d076ee744b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7578 4936 bytes
font_01_sfnt_off00008664.bin
1c524e3743ba5fe83528262ff162e58ccaad2fac09d3b02d5a9a71ccbe204b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8664 14304 bytes

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