Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9ef3b80a4b57e5…

MALICIOUS

PDF

40.0 KB Created: 2020-07-09 23:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5c48140bd13738b942094fb01e91723d SHA-1: 4960a1bbd666e1c4927211e1d1834de60d26920e SHA-256: aa9ef3b80a4b57e50c1ea021ee7cf48db8a23f9c41c665523bb66c0a1bbd2362
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.cc/wb?keyword=solids%20liquids%20and%20gas%20worksheet', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure through a link farm, likely for phishing or malware distribution.

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.cc/wb?keyword=solids%20liquids%20and%20gas%20worksheet In PDF document text
    • http://files.fabiochef.com/uploads/1/3/1/8/131871622/zulelajojime_nutun.pdfIn PDF document text
    • http://files.sheilabalzer.com/uploads/1/3/2/7/132710575/kososameregiwi.pdfIn PDF document text
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdfIn PDF document text
    • http://files.carriedolan.com/uploads/1/3/0/7/130776864/9017134.pdfIn PDF document text
    • http://files.mobilecarandrvdetail.com/uploads/1/3/1/3/131379223/wawusoneri.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://files.maxiandolikessler.com/uploads/1/3/2/6/132683289/9094524.pdfIn PDF document text
    • http://files.studioschmidtdesigns.com/uploads/1/3/0/8/130814868/devazofupopokako.pdfIn PDF document text
    • http://files.summerbeez.com/uploads/1/3/0/7/130775138/jososoxukifij-mofalirevijubum.pdfIn PDF document text
    • http://files.military2millionaires.com/uploads/1/3/1/8/131872273/gitufajerifinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vorelav760549551.files.wordpress.com/2020/07/nunufudabo.pdfIn PDF document text
    • https://wufuwodela.files.wordpress.com/2020/07/totekopozugifukupupoj.pdfIn PDF document text
    • https://vavaxuxaber.files.wordpress.com/2020/07/35335345155.pdfIn PDF document text
    • https://samebis.files.wordpress.com/2020/07/20093865453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.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_off00005ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 5352 bytes
SHA-256: 0cdc87ee425fa129e0d65d747e321e3e3f04b20fb6c1459f64482d0aec5b3d6b
font_01_sfnt_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 10088 bytes
SHA-256: f8f3690ab95c75d2075580597fd4b9f879746f4ff389aaf49772a339e6dc9099

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