Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cc4806937afebb…

MALICIOUS

PDF

39.9 KB Created: 2020-08-14 20:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba367c74fac30e19f8d0e5b2dda7c0e SHA-1: 25dfd019009a1579942dd03e0ba099c44c7d3f80 SHA-256: 64cc4806937afebbde9c829048ec94a7e67cdd4535b9435b15ade32fb801d088
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text that appears to be a lure for the redirector. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to potentially harmful content.

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.cc/pify?keyword=addicted+song++enrique+iglesias
    • http://kakadiv.thebirdnthebeastsfarmstead.com/uploads/1/3/1/3/131384201/latir_mimafovikiromo.pdf
    • http://files.tlcvegan.com/uploads/1/3/0/7/130776486/7313623.pdf
    • http://files.adamsmetaldetectorsuk.com/uploads/1/3/1/4/131407227/4661261.pdf
    • http://files.teambuildingdays.org/uploads/1/3/0/7/130738836/3b1bb4186c.pdf
    • http://files.moongoat.com/uploads/1/3/1/4/131482939/d01c01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/furufewojob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/mujilefanabikemibazedubib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/acute_mastoiditis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/archive_outlook_messages_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/40672968351.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/battlestar_galactica_1978.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/68862659725.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/sojamaganutakaxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/mafumuvebiguziwetimewo.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_off00005d02.bin
1d3f6279e843551fd1ee085650856ccef935d7ff8010beb8f6fbe18f9f0e3868
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D02 5224 bytes
font_01_sfnt_off00006ebe.bin
5479ad2017e55287923fb4cd6e12388b4571347771e9d97fd93bb31396654272
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 10596 bytes