Malicious PDF — malware analysis report

Static analysis result for SHA-256 1383df009da86560…

MALICIOUS

PDF

52.8 KB Created: 2020-11-09 08:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c600002df24e65f14e47a3041614a53c SHA-1: 939647de0666955ade291128d4683a39e10ab25b SHA-256: 1383df009da86560efab86a9945c13f95621ed6478d2dda946308533b5af8437
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting, characteristic of a link farm. One of these links, https://traffking.ru/123?keyword=adrienne+kennedy+archive, is identified as a malicious redirector, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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://traffking.ru/123?keyword=adrienne+kennedy+archive In PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/9826332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/modotizesafejilusojusejo.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://fazojikimugu656942302.files.wordpress.com/2020/11/how_to_make_crack_in_the_microwave.pdfIn PDF document text
    • https://mepatesa.files.wordpress.com/2020/11/70728926962.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/plant_and_animal_cell_worksheets_key.pdfIn PDF document text
    • https://wodetojojo.files.wordpress.com/2020/11/93372923814.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/entrepreneurship_grade_9.pdfIn PDF document text
    • https://derefaraduz.files.wordpress.com/2020/11/dauntless_repeater_guide.pdfIn PDF document text
    • https://xivokagix.files.wordpress.com/2020/11/penadegakiruwijoniw.pdfIn PDF document text
    • https://safopidupi.files.wordpress.com/2020/11/bedigutamudexa.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/78771958474.pdfIn PDF document text
    • https://tuvogeluwe.files.wordpress.com/2020/11/buddhist_philosophy_a_historical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/mythe_de_sisyphe_camus_rsum.pdfIn PDF document text
    • https://lotitogigi.files.wordpress.com/2020/11/diagrama_de_contexto_nivel_1.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_off0000903e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903E 5032 bytes
SHA-256: 216ed107176d4312603a2c021416768764548fa1be8334c58a176079c257cb96
font_01_sfnt_off0000a168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA168 10888 bytes
SHA-256: edf9f83332d5ca433c72d0fdf13380383aa16eafce04a7d8c0e3e791670b7f1e

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