Malicious PDF — malware analysis report

Static analysis result for SHA-256 1173ec56081d6d48…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 18:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c188858eb1748cb2da792410c61a84 SHA-1: c1fcf7ce5cccd6ec47bc5b7c42d7612451935177 SHA-256: 1173ec56081d6d48391d5c2c917a9673e1581c383c1bade133f75ed7a01f1f4f
154 Risk Score

Malware Insights

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

This PDF file contains a link farm and a redirector to malicious infrastructure, masquerading as aged care guidelines. The ML classifier strongly indicated maliciousness. The embedded URLs are likely used to distribute further malicious content or phish for information.

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/pify?keyword=aged+care+home+care+package+guidelines
    • http://latet.fccwareham.org/uploads/1/3/0/8/130874422/6f924d25027c.pdf
    • http://gasanigu.pentictonexcel.com/uploads/1/3/0/7/130738943/xevidawaka.pdf
    • http://files.supernovabaton.com/uploads/1/3/0/8/130813108/delosidijimofezot.pdf
    • http://pikadon.homesbycrosswinds.com/uploads/1/3/0/8/130813710/wofuvomoweweso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/gibag.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/20141296520.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/78375716317.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/17785366587.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/jepojuxirogevajaxal.pdf
    • https://cdn.shopify.com/s/files/1/0437/4495/2471/files/24316_chippewa_trl._moreno_valley_ca_92557.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/componentes_organicos_del_suelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/dusomumorajexejidusunu.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_off00006623.bin
2200bb00862659895547d03bc205be533d227512fc0886a0c5c9b2af42597505
pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 5540 bytes
font_01_sfnt_off000078ca.bin
3aa1bff9d4384d68d740dfffe77dfcb98e5f012bb8ab5047e38c827204985305
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 10008 bytes