Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17a89b7b48fcead…

MALICIOUS

PDF

44.4 KB Created: 2020-07-08 16:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 7c464145e48220993c2e8703a7cf5baf SHA-1: e547b73e0fcd865a0eeda4c284326e1fb372636d SHA-256: a17a89b7b48fcead74afa3f545bf6214ec0c8aa45bafe012c7d809574ad490ba
184 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior through its embedded links. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic indicates a direct link to a known malicious redirector, while the PDF_SEO_LINK_FARM heuristic reveals a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The document body contains a mix of seemingly random text and the identified URLs, reinforcing the malicious redirection and link farm attack patterns.

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=ritter%20204%20manual%20exam%20table In PDF document text
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdfIn PDF document text
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.pdfIn PDF document text
    • http://files.jasonsmurphy.com/uploads/1/3/1/3/131380915/e64b9e76f.pdfIn PDF document text
    • http://files.happycentric.com/uploads/1/3/1/6/131606674/90d3e.pdfIn PDF document text
    • http://files.reuniontheatregroup.org/uploads/1/3/2/3/132302810/xevoterekonaxol_sogagejefepaje_sufiluxafate.pdfIn PDF document text
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdfIn PDF document text
    • http://files.creativeconsulting.marketing/uploads/1/3/1/3/131383959/3198923.pdfIn PDF document text
    • http://files.iskconlasvegas.com/uploads/1/3/0/8/130873849/gigorijikol.pdfIn PDF document text
    • http://files.richardgoldsworthy.org/uploads/1/3/1/4/131437445/9901431.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://judipexiwe.files.wordpress.com/2020/07/65843509771.pdfIn PDF document text
    • https://magamutasadu.files.wordpress.com/2020/07/gepagofifexarisu.pdfIn PDF document text
    • https://kolifapotu.files.wordpress.com/2020/07/17361874934.pdfIn PDF document text
    • https://kopuzikofofa.files.wordpress.com/2020/06/64239799659.pdfIn PDF document text
    • https://kopugugew.files.wordpress.com/2020/07/giganunidamisuza.pdfIn PDF document text
    • https://selijowo.files.wordpress.com/2020/07/xemexofarudes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.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_off00006677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5000 bytes
SHA-256: 9c9528a7910e059f4c4c90af8fd2b57f150f0e52ba5e0de4198192f7029160ce
font_01_sfnt_off00007759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 14668 bytes
SHA-256: 1decf5e8a0b27151700e06217cd06d1514ea2ef40b9300d5a8e1324e61eadc48

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