Malicious PDF — malware analysis report

Static analysis result for SHA-256 561e193b0be3a989…

MALICIOUS

PDF

47.9 KB Created: 2020-08-04 01:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b4b6c336affc3072b8ea700211fd92d SHA-1: 3f52163e31c96e305ba83ad75cc54e0dfab5767a SHA-256: 561e193b0be3a989ca13f6e24d46f11d601388e853d6f3770f484393affe84aa
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, includes text suggesting a lure related to 'theorems of boolean algebra proof pdf' and the malicious URL. This indicates an attempt to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=theorems+of+boolean+algebra+proof+pdf
    • http://files.ivyshi.org/uploads/1/3/1/3/131379410/dagebu_bedubu_sunipivup.pdf
    • http://nekox.missionlivingwaters.com/uploads/1/3/2/3/132303229/nolazumeponuviwi.pdf
    • http://files.inspiralnyc.com/uploads/1/3/1/3/131383777/d7ccbd72b72.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/wekinufuposoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/dutoxurusi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/24509462822.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/beponakoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/bifewekunibivovibavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/57195146754.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/weather_underground_syracuse_ny.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/38344330601.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/28664583366.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/17777404690.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/pisafujolujunafumedulaxar.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_off0000747a.bin
ccba252c7b2796cdfa1c06fc0ebddb4a3435031cc0e79116dabd7de5cbb3f3e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747A 5544 bytes
font_01_sfnt_off00008722.bin
cb6caf40d679ab74b81916d13e37ef4a94d7ba009fae3e8f8297825fbfac3ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8722 13796 bytes

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