Malicious PDF — malware analysis report

Static analysis result for SHA-256 385571887cfd97c5…

MALICIOUS

PDF

32.7 KB Created: 2020-08-01 09:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62c90463acb3aeadce1b106d540964a4 SHA-1: 3a28a7134802bdf936f0f3eef95c30fa0794cc04 SHA-256: 385571887cfd97c5a534ca64cd2955a514884b87e22d2428a452c5cdf0eb19c0
120 Risk Score

Malware Insights

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

The PDF document contains a link farm, with one primary link pointing to a known malicious redirector. The document body is obfuscated but contains the same URL. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. 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.ru/pify?keyword=low+roar+bones+lyrics
    • http://files.pcovenant.com/uploads/1/3/2/3/132303359/lebunutirakifi.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • http://files.kd-photography.com/uploads/1/3/0/8/130813134/miviv_zidup_makanup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/74948023261.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/66215263446.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/vunaliritavusexepitevefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/lidulenonunaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/dezizesigafud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1571/files/dabumetudomuxazevumiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/33450072993.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/timex_cr2016_cell.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/lolekamuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/57425654251.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/86389230207.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/20197549266.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_off00004528.bin
d926c01749df3a08e8e07e300090376f4bcfca9f46d6befec0975886a389ee88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4528 5068 bytes
font_01_sfnt_off0000568d.bin
e85eb98be3e77f8d369fe3e4864a4b4a12889ced86d5f78e14f3366a1c78ed05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568D 9284 bytes

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