Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5a99d9b3d2af4e…

MALICIOUS

PDF

43.6 KB Created: 2020-07-15 06:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5752328e4eb3acd219ab2d15d21ef5a3 SHA-1: 082120b12a0822f79f9e1fa39c943cae6af8f448 SHA-256: ac5a99d9b3d2af4eca75d2bf230f87f24c7d75d490caa365116a7559d7d8e218
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The embedded URLs are likely used to lure users to malicious sites, potentially for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific 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.com/wb?keyword=multiplication%20facts%202%205%2010%20worksheets
    • http://files.heart-art-13.com/uploads/1/3/0/8/130874035/d6eec4ea6f968b.pdf
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdf
    • http://files.glacierwolfpacktheatre.com/uploads/1/3/1/1/131163740/sonarixorefude.pdf
    • http://files.roswellorchestra.org/uploads/1/3/1/3/131378779/9685406.pdf
    • http://files.jumicakes.com/uploads/1/3/2/6/132681209/tudanon.pdf
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • http://files.stlukescda.org/uploads/1/3/0/8/130813616/3271225.pdf
    • http://files.survivehc.com/uploads/1/3/2/6/132695874/0745947bdb3238a.pdf
    • http://files.martindaly.ca/uploads/1/3/1/0/131070116/d1e94119091.pdf
    • http://files.survivehc.com/uploads/1/3/2/6/132
    • https://tojugodusino.files.wordpress.com/2020/07/91747022333.pdf
    • https://xifodanupi.files.wordpress.com/2020/06/gudeji.pdf
    • https://jowifigubug.files.wordpress.com/2020/06/87460744399.pdf
    • https://gilokomi347545451.files.wordpress.com/2020/07/mejumadujuxopesinepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/99357861908.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/52217521535.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/35425903901.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xibazukikamemawamiwemin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/44058085631.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/xidiverelasupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.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_off00006cfb.bin
8e9cece69b812b451ec5d93591cf432c6a5b8b3a7706598735e8ab28acecc6f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFB 5596 bytes
font_01_sfnt_off0000801a.bin
b9bc3a4c7973a7ed8f3e56036fb301f3f38f6636749b0424337e0d149cee63d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x801A 9648 bytes