Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa500113fd704b6…

MALICIOUS

PDF

39.0 KB Created: 2020-08-13 05:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f9e456ecbd9c67a0ad9901e7730ade1 SHA-1: 2146ad2cbc0dbef0e906e8b1ef53a9c66f83a58a SHA-256: ffa500113fd704b6ebb57f5ad897994b910f5c2b3bc9d267199dbb1595065ed3
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the redirection to a known malicious site, and the PDF_SEO_LINK_FARM heuristic indicates a large number of similar links within the document.

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/wb?keyword=data%20structures%20and%20algorithms%20in%20python%20goodrich%20pdf%20download
    • http://files.rbrphotography.ca/uploads/1/3/1/4/131406344/tuwanivoxis-zoxef.pdf
    • http://files.lepinkandco.com/uploads/1/3/1/3/131380966/7173eb110856d.pdf
    • http://files.normsphotoblog.com/uploads/1/3/1/4/131437005/lowutamaveja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7114/files/carpentry_workshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/18982407435.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/99457821650.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/powezovitefoken.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/zunufubokawogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/94902333313.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/83162401742.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/deadmau5_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/zuvegotogabidatep.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/bakupagumo.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_off00005428.bin
2b097f71791394eb95511184eb0818445f2215153bc64fe8cb2291c115cffd8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5428 5760 bytes
font_01_sfnt_off000067af.bin
bda831207c5d5fd73c7ff99d7576ea7f19af5d38d55e70fdff0a34c873e9d807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 11380 bytes

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