Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea16b83b9a35fe6e…

MALICIOUS

PDF

42.3 KB Created: 2020-10-14 21:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cbc3be7129612916ada08add35e39894 SHA-1: e0d1dc9d74ce2bbd3b0a840fc1119df62d58b5c1 SHA-256: ea16b83b9a35fe6eff38882dbcbeb0d98e1db59e3cc418ee5aed3af0a6bfb1ed
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ggtraff.ru' and a link farm pointing to multiple PDF files hosted on Weebly. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ggtraff.ru/123?keyword=stock+market+101+philippines+pdf', suggesting a lure related to financial information to drive users to malicious infrastructure.

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://ggtraff.ru/123?keyword=stock+market+101+philippines+pdf In PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/pesegisekojen.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/f1dfc27.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://site-1043853.mozfiles.com/files/1043853/mebefofax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f873b92ef903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f871531829a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f873b0865b48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9094/3381/files/churches_in_camden_county_nj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/86689924979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0091/3310/files/bawojipizobuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1812/9055/files/avg_business_ui_failed_to_load.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6479/4522/files/doyle_lawson_and_quicksilver_albums.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6186/9214/files/61069116654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0663/1325/files/dancing_with_the_stars_2020_season.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/sit_and_reach_box_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7035/7149/files/mitutiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/42785712945.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 5756 bytes
SHA-256: 6725e37656387382deb95a166b990488ee7b5f4078c75ece9c9ce81b1ed8b8d3
font_01_sfnt_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 10620 bytes
SHA-256: f5a619eb315f87e076a61ce7c715897b80399c053402652af8c8c4411cea4a96

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