Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf65e0057ef05775…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 23:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911f05e831af90c72b65091fa04f1f84 SHA-1: 678f7f5dbe9c77c1aa5b8639577a00d775318921 SHA-256: bf65e0057ef0577563d1dc83a977587f016c562895b2ef68777a7062bf9f96f0
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link is https://ttraff.cc/wb?keyword=building%20spelling%20skills%20grade%202%20pdf, which is designed to lead users to further malicious content. The document's structure suggests a link farm or SEO poisoning tactic to distribute malicious URLs.

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=building%20spelling%20skills%20grade%202%20pdf
    • http://files.jenniferrosewebster.com/uploads/1/3/0/8/130874124/lotelino.pdf
    • http://files.qcie.org/uploads/1/3/0/8/130874257/povej_tozizamore.pdf
    • http://files.troupe42.com/uploads/1/3/0/7/130776726/pukadupoluxuzepenure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/72394183441.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/73727348604.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/pixitodawosev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/89433743240.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/projected_coordinate_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/jipiwulexonivaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/49881909569.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/28621248607.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/74753723697.pdf
    • https://cdn.shopify.com/s/files/1/0434/4250/3832/files/lilaxinarubem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/vawomurenato.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/43418350184.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/calendario_colombiano_2020.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_off000058a0.bin
e43f16256585dca909c0a3e6354c94721c7ced6af1a0570392660aa28eea8aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A0 5456 bytes
font_01_sfnt_off00006b38.bin
89869d335f72e6007dc2a3fe83db26339cdac8cf19ab274268403c948d1bc7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B38 9652 bytes

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