Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d52d6cb7bfb8c9…

MALICIOUS

PDF

46.7 KB Created: 2020-07-08 15:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 700f752d1a6630f01eca436656417d11 SHA-1: b5d3d5b220805306212695d6d6d2f65eddba2dfe SHA-256: f3d52d6cb7bfb8c97682555be65364bb0e2d26eb3ca8a8f54be11ef1c973b0f8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to domains associated with link farms and SEO poisoning tactics. One critical heuristic identified a link to a known malicious redirector, 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though malformed, contains keywords that match the URL, suggesting a lure to entice clicks on these links.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=necromunda%20tactics%20cards%20pdf In PDF document text
    • http://files.guamtattooist.com/uploads/1/3/1/3/131398066/1cbe6e50.pdfIn PDF document text
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdfIn PDF document text
    • http://files.dylanranney.com/uploads/1/3/2/7/132740398/70d24.pdfIn PDF document text
    • http://files.herbaceouslyurban.com/uploads/1/3/1/3/131379951/kelotaxemu_wugubefabilesuj_zuwifo_bufosusaku.pdfIn PDF document text
    • http://files.hoolants-beton.com/uploads/1/3/0/9/130969993/soveniw.pdfIn PDF document text
    • http://files.suemediaproductions.com/uploads/1/3/1/0/131070523/3756327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pariwofa.files.wordpress.com/2020/06/nukimipizurasekasi.pdfIn PDF document text
    • https://zufiwupaned.files.wordpress.com/2020/06/vokotedefugajekenuzazi.pdfIn PDF document text
    • https://kogovabazoro.files.wordpress.com/2020/06/vuduruza.pdfIn PDF document text
    • https://demolig.files.wordpress.com/2020/06/11481337339.pdfIn PDF document text
    • https://pixaxaxaluz585082879.files.wordpress.com/2020/06/duwosegofepirirabifisu.pdfIn PDF document text
    • https://zonutubuw.files.wordpress.com/2020/06/60984138467.pdfIn PDF document text
    • https://suvajip.files.wordpress.com/2020/07/pikerasamiv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 5120 bytes
SHA-256: 40899758bb6cab756a5c12d9ba24daac17234c9118c058732eda5c920e8e90b0
font_01_sfnt_off0000888a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888A 11168 bytes
SHA-256: dfed8e3cdb4c0ac8bbc5ef626c3f5e62fa60e0e7a72e7c44684682b1590d3864

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