Malicious PDF — malware analysis report

Static analysis result for SHA-256 5961ef43537cf68a…

MALICIOUS

PDF

43.4 KB Created: 2020-08-12 17:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6c8ec2db370e47299b964217284cc6 SHA-1: 7a588aa29ef9a57fb5320ce41b6fa48382af028d SHA-256: 5961ef43537cf68a0af0a3998a767c4876e602472573d6f97cdfdfd2ea1c1621
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wb?keyword=1000%20conversation%20questions%20pdf%20download'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is 'https://cdn.shopify.com/s/files/1/0437/7827/7525/files/assertive_business_communication.pdf'. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to disguise malicious activity as a legitimate download lure.

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=1000%20conversation%20questions%20pdf%20download
    • http://files.shannonlarsen.com/uploads/1/3/2/6/132681150/7810679.pdf
    • http://files.dptrackandfield.org/uploads/1/3/1/3/131398117/b31adad475303.pdf
    • http://files.jeanbarrettpetphotography.com/uploads/1/3/1/3/131381681/nanep_sevixuxazem_degaluxulizot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/assertive_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/array_programming_questions_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/xunifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8433/9613/files/35702411132.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/41623922369.pdf
    • https://cdn.shopify.com/s/files/1/0437/4347/7909/files/70402066301.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/mabufijorajuledukuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/74748151677.pdf
    • https://cdn.shopify.com/s/files/1/0436/1158/6722/files/66247888020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/botany_for_gardeners_3rd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/15953784715.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_off000066d1.bin
7550c5655a0ae0ec4424bb2f68d7429e1e41e2a6206de0f4143cb9565302bc41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 5528 bytes
font_01_sfnt_off000079ad.bin
464e9a63e081db69bec471612f12631b0660bd648819333f68d7751385f7db85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 11900 bytes

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