Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce7c36d71f15e80…

MALICIOUS

PDF

38.4 KB Created: 2020-08-03 07:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a0d74baf68908917398fa43ba43575f SHA-1: f2c8d5e7f26387e9eb039ecd8b303f82c6c32810 SHA-256: 0ce7c36d71f15e806555ccb6d59456fdae14e728d9a471883f5a76c80a449a5a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link disguised as a utility for converting app files, aiming to trick users into clicking it. The document body and heuristics indicate a lure to external content, likely a phishing site or malware download. The presence of numerous external PDF links further suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=convert+app+to+ipa
    • http://files.carriagehouseclothing.com/uploads/1/3/0/7/130738779/786b1.pdf
    • http://files.43squadronassociation.com/uploads/1/3/0/7/130776500/2968038.pdf
    • http://files.52badstoriesandmore.com/uploads/1/3/0/8/130814716/e9cf8d.pdf
    • http://files.aucklandpolo.com/uploads/1/3/1/8/131856122/desizarugotudowe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/32060308048.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/zoxozolurutinezusedemeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/disposable_email_address.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/2017_toyota_tacoma_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/lebuzunox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/3368843045.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/fafuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7171/files/fevabefekofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/zobobatejadosew.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/71612366466.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/fojevox.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a55.bin
081a6a3c57c48184053295235a7bd07a28867136468d580d18774b16b8c5bbeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 4568 bytes
font_01_sfnt_off000069ed.bin
238f812afa73dd426c168c74a54652383cc78fd06f29f9b2ddce8a4603614447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69ED 10284 bytes

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