Malicious PDF — malware analysis report

Static analysis result for SHA-256 5035746c320efb59…

MALICIOUS

PDF

40.1 KB Created: 2020-09-18 12:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa72284a48b87189b9eb1ceccb9c0304 SHA-1: 611031a8ffaa8bd153d9b197ecb8d8c3735e175d SHA-256: 5035746c320efb59660e271c3b7c599111c44d1ed9554c9b000ce4bfafc5aa06
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.link/wix?keyword=12+year+prayer'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The document body, though obfuscated, contains the same suspicious URL, reinforcing the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/wix?keyword=12+year+prayer
    • http://files.theconferenceofbirds.com/uploads/1/3/0/7/130740191/3794661.pdf
    • http://files.independentlydriven.com/uploads/1/3/0/7/130775346/3549804.pdf
    • http://files.runningmcorgis.com/uploads/1/3/2/6/132680808/c3fcdab.pdf
    • http://files.lamarqueitaliangreyhounds.com/uploads/1/3/1/1/131164382/3344789.pdf
    • http://files.theblackorchid.net/uploads/1/3/1/1/131163932/89c70ab.pdf
    • https://1cb36651-6410-4348-a83b-73fa1f371b31.filesusr.com/ugd/834936_e646712827ef4fc2a568a587e1540f46.pdf?index=true
    • https://f774f7fb-6900-44f3-ace6-237f1daa282f.filesusr.com/ugd/6f58fb_e95575e052c648ab9a9ce372aa8ddde4.pdf?index=true
    • https://7c8f02a0-fe63-4c0c-b9b9-fa9fcc8bf703.filesusr.com/ugd/b81754_ef694292b9654fc0a1f8c70c43f5d5a1.pdf?index=true
    • https://b6732ada-8ec8-48a1-a819-3828e0f28dd4.filesusr.com/ugd/9df9d6_76f20fcf350244f1844961a2be94673c.pdf?index=true
    • https://5e19a0c3-d8cf-42b5-b0cb-91db4ba95944.filesusr.com/ugd/f65518_59ed9f887031415db9a1cdf83082fd13.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/75596488322.pdf
    • https://cdn.shopify.com/s/files/1/0440/5844/3941/files/15384316988.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/74246279563.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/68040273056.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_off0000614b.bin
a5da72306802e3f3cf7fc00aaf085cdaff8b75e324c645a02116b2f9aac843d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 4792 bytes
font_01_sfnt_off000071b4.bin
fd12140f8804b82f36554c3aa881d2f3a5c0e8885665003ef7bcecc81d20edb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 10080 bytes