Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21dd8068a3788c6…

MALICIOUS

PDF

59.1 KB Created: 2020-08-15 00:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1555f18c11c861b062a6938f9120aaa SHA-1: c3dc21587176ef8d6aca86b9e1566ade64e1426a SHA-256: a21dd8068a3788c6fe0228f0c0efb797975b86dde583fa0d0ffc6d0c128a292e
150 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 'ttraff.com'. This URL is presented within the document body, disguised as a tenancy agreement template. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering, tricking the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=tenancy+agreement+template+ontario
    • http://files.maryburton.rehab/uploads/1/3/2/6/132681479/junululele.pdf
    • http://xiralubi.illuminatingbirth.com/uploads/1/3/2/7/132710621/2593691.pdf
    • http://files.rezawood.com/uploads/1/3/2/6/132683246/sawebaxowini.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/23306296874.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/difference_between_basel_2_and_basel_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/43562035680.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/minefibepurovib.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/gesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/3579502643.pdf
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/hotspot_wifi_android.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/zapexanirejikeduju.pdf
    • https://cdn.shopify.com/s/files/1/0440/7292/7384/files/lugifobokupipefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/verojikixojogeko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c02.bin
d72531ced1794a9fac949c439186fd9c0c82326f5680f941023c7ffedfae58c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C02 4916 bytes
font_01_sfnt_off0000aca2.bin
a7056df8b0161676501834cc1d09f06ef2bcf1dd87fca3424eb416b54b25445e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA2 10784 bytes
font_02_sfnt_off0000d142.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD142 4324 bytes

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