Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a44fd243b0e413…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 03:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0bda3b4eb2a8bac0758d51c0f66830 SHA-1: 6335257e8430ef9f7f2c273657d3a6c7150aa3c9 SHA-256: 72a44fd243b0e413a36fe040a07b3446506e1bfd7326043b3c323f29d99d8e41
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to direct users to external resources. One prominent link, 'https://ttraff.cc/pify?keyword=ductus+arterioso+persistente+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains similar URLs, suggesting an attempt to lure users to malicious sites for further exploitation.

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=ductus+arterioso+persistente+pdf
    • http://lixex.joshphilpott.net/uploads/1/3/1/4/131406286/9319765.pdf
    • http://reruti.mountbiggs.school.nz/uploads/1/3/1/0/131069839/3655482.pdf
    • http://files.magnoliaruneqcenter.com/uploads/1/3/1/6/131636697/b031112b88.pdf
    • http://files.sunsethealthsafetyproducts.net/uploads/1/3/2/6/132681488/6838983.pdf
    • http://files.aurashjasonsoroosh.com/uploads/1/3/2/6/132696483/tebafiratib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/rixufad.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/liwatidub.pdf
    • https://cdn.shopify.com/s/files/1/0439/2799/4523/files/xuganijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xezunegudowafosixezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/limurusase.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/data_envelopment_analysis_theory_methodology_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/barefoot_investor_audiobook_itunes.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/1748154113.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/stay_with_me_sam_smith.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/80282714796.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/small_pro_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/fewotuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/xakivimokawuxufozavuwawet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/kajadoxexirona.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_off00006ecf.bin
7362d4fc323e1e8b895f8df0eae022681ab05703f5d65e3df8dfead1976fa02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 5116 bytes
font_01_sfnt_off0000804f.bin
89913608d0d7e949b2d21158b6d230529203feac0aa8187620eb075398ec7841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804F 10400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.