Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddd1d8746b52b9e…

MALICIOUS

PDF

49.9 KB Created: 2020-10-28 21:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48b18b3676603c0f1d52884dffcd96ba SHA-1: 803a149a64858c9596b897159039a53a84f75c48 SHA-256: 2ddd1d8746b52b9ed6dfbde9db4e8e705a171fea302f0dd7174d9d4c207822bd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to link farms and a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.cc/123?keyword=georgia+state+defense+force+requirements
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/pajifedudofakilegiw.pdf
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/ab8c8e561a50a3.pdf
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/825a3b4957.pdf
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/70b195893.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/zitevixazezawi.pdf
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/5583184.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/2080317.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0465/8174/3783/files/21989579849.pdf
    • https://s3.amazonaws.com/tuxutedi/carbohydrates_food_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/8637807052.pdf
    • https://s3.amazonaws.com/dixaleko/gunezovoweronoro.pdf
    • https://s3.amazonaws.com/subud/wuraniparakitefu.pdf
    • https://s3.amazonaws.com/gupuso/jowovafobedov.pdf
    • https://s3.amazonaws.com/lomogas/fufusigoxakagoxanu.pdf
    • https://s3.amazonaws.com/jotizifime/ap_stylebook_2017.pdf
    • https://s3.amazonaws.com/jufowokedunod/28370704248.pdf
    • https://s3.amazonaws.com/rupatojuko/krishna_bal_leela_in_hindi.pdf
    • https://s3.amazonaws.com/gupuso/nusonumimuku.pdf
    • https://s3.amazonaws.com/xezujuxoz/ectomorph_workout_and_diet.pdf
    • https://cdn.shopify.com/s/files/1/0475/2126/7878/files/86068980331.pdf
    • https://s3.amazonaws.com/subud/funciones_de_base_de_datos_ejemplos.pdf
    • https://s3.amazonaws.com/jewizopukuni/85983253641.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c4.bin
c846715147b7cefbad41954556c81495eb9e25c1203cc3254487fea18c64289f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C4 5348 bytes
font_01_sfnt_off000087d9.bin
61ac9b61b01721ca92eb4e376f72d30240ef7919f15e76ecae8cc8ad107359c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 10552 bytes
font_02_sfnt_off0000abd0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD0 4324 bytes

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