Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e855c30789e504…

MALICIOUS

PDF

44.3 KB Created: 2020-07-19 02:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0490b95566e2b2f2854533b5fd27c45e SHA-1: c640eea9318bd97628de3fb66118a28792770555 SHA-256: 14e855c30789e5044b5e004b9f9c11e2ca13c456288fc15ebf83d959f4824f1c
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the document's structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

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.ru/wb?keyword=metric%20units%20of%20measurement%20worksheet%20pdf
    • http://files.davidlhoytfoundation.org/uploads/1/3/0/9/130969932/3391223.pdf
    • http://files.mainesting.com/uploads/1/3/1/4/131437743/jeloxutosugef_sebodemoketij_bujatonev.pdf
    • http://files.premierebasketball.com/uploads/1/3/0/7/130775658/e64deae95b2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dezukov.files.wordpress.com/2020/07/kudupezovolosibebodo.pdf
    • https://fesedaxunag.files.wordpress.com/2020/06/dokaloratidorazeduvi.pdf
    • https://warezofokel.files.wordpress.com/2020/06/57567779505.pdf
    • https://gefujonusa.files.wordpress.com/2020/06/36973780906.pdf
    • https://lebavop.files.wordpress.com/2020/07/98199685339.pdf
    • https://xorezik.files.wordpress.com/2020/07/87570585740.pdf
    • https://zujurox.files.wordpress.com/2020/07/nixokanojabiteg.pdf
    • https://tolotaf347469470.files.wordpress.com/2020/07/vasuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/55064784997.pdf
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/tipijuxawona.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/fovadeboka.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/sabujuxawexapinizudunare.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/tusikutagedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/75991747104.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/sibaguxutudopuban.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_off00006f3a.bin
beeb4e10fe0b97925bc9b632d506d276833ee2453f1ab7d55e2ff789f1410071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 5408 bytes
font_01_sfnt_off0000818d.bin
7efa0f47d7d47f1f890525a1ece77016600858e6de95de55a9d38b372f3b62cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 10024 bytes

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