Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aea79aae463dca…

MALICIOUS

PDF

38.3 KB Created: 2020-08-08 02:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 654310b2326ebcae818e15c3e41ef705 SHA-1: c47454328958da382d3ae7006b795227a399a646 SHA-256: 25aea79aae463dcac2fa604a570fb1570e5c78ca4ddbca5aae459406a3dfc4f6
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'computer networking notes pdf'. The PDF_SEO_LINK_FARM heuristic suggests a large number of external links were generated, likely for SEO manipulation to increase visibility of the malicious content. No scripts were extracted from this sample.

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.com/wb?keyword=computer%20networking%20notes%20pdf
    • http://files.souderlandscaping.com/uploads/1/3/1/4/131437755/6069427.pdf
    • http://vejafuwa.terraformidable.com/uploads/1/3/1/4/131409090/topowage.pdf
    • http://files.brjcdac.org/uploads/1/3/1/6/131607005/zagojof.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/vexotazivukajudiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/puxowozujeremorage.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/32998120905.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/benefits_of_agroforestry_practices.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0938/files/66136603148.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/pubebogodaxoxozudogib.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/24936860345.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/advanced_java_objective_type_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/66226907589.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/5110924296.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_off00005981.bin
5257e42b69a42ce44be5c814521a46ae78d96ae1e671369123a1c4ce393301b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5981 5180 bytes
font_01_sfnt_off00006b24.bin
f728e404903c64308360ffa90218788ae720b91db974902cf9e12879081cd03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 9796 bytes

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