Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff8f2686dd45fe7…

MALICIOUS

PDF

36.0 KB Created: 2020-08-14 07:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fb6bc96b22859634c4d6454555a61c8 SHA-1: 34f4d2158f4ddbc26c36d81f62b3aee7f31e586f SHA-256: 3ff8f2686dd45fe7c434f69212f4533ba5a5c631d387f00a05558510952e1c06
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'law of gravitational force worksheet' and the malicious URL itself, suggesting a lure to trick users into clicking. The presence of numerous external PDF links, many pointing to Shopify domains, further supports the link farm and potential distribution vector.

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=law+of+gravitational+force+worksheet
    • http://dobumini.simplyhooked.co/uploads/1/3/1/8/131856713/mirarugegato.pdf
    • http://files.weareoneflowyoga.com/uploads/1/3/2/6/132695405/7265236.pdf
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/44120877330.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/75349624744.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/gumatezokitujovuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7957/files/61793317650.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/astm_e83_16.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/60497262845.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1757/files/moment_area_method.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/miporomenanisufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/7560863017.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/erosive_gastritis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/pasudarunetilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/66823291627.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_off00004d51.bin
508d902a53a663cfb5cf8491bcd215dd70cc06902191a07ba4f6dd5a9dfffa32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D51 5300 bytes
font_01_sfnt_off00005f72.bin
c791dac74584aece035d6b9b405b0faa7e8db2bf5a1f3b51ea0a2b3c8f1a9c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 10500 bytes

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