Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a227dc7aa29d942…

MALICIOUS

PDF

50.7 KB Created: 2020-08-04 07:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 925c51f3d942f0604c6c2b359553656b SHA-1: b55a9c370807b1cfa8c3502d1d0cbe37eb284d34 SHA-256: 9a227dc7aa29d9420d6ab149ba59911deb5ce4e3a5556de76ac1c45086b77d5c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Microscopic identification of fungi pdf" and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous external links, including the malicious redirector, indicates an attempt to lead the user to malicious content.

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=microscopic+identification+of+fungi+pdf
    • http://files.goldengobletrestaurant.com/uploads/1/3/1/3/131384605/raruxolepukeb_zobibemupinu_femivaji_xajavevom.pdf
    • http://files.dogsbestfriendcr.com/uploads/1/3/0/7/130738708/7878e73e14091.pdf
    • http://files.docgraf.com/uploads/1/3/2/6/132695451/32074.pdf
    • http://files.ecmstudy.com/uploads/1/3/2/7/132711947/8d7668123d.pdf
    • http://files.matadorsurfboards.com/uploads/1/3/1/3/131398194/7821151.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/97356821243.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/61705994798.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8933/files/vutozura.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/buduruteludabinarexuwexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/tovujuvopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5624/files/16395913813.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/suxelude.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/36811949159.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/78283511426.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/zijarupukitonadezu.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_off00008886.bin
d6c15341717e8d46759c191443db091bc359c9a3e8fe9db4fbb62a1ebe7974cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 5296 bytes
font_01_sfnt_off00009aad.bin
7961b168281e55226a638d8be27cdb66518a62353ab9bf32aab5ffcd6b1b26dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAD 10116 bytes

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