Malicious PDF — malware analysis report

Static analysis result for SHA-256 040ee0cc5b42941f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 05:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8413421037d7504fdd2c4e1f7528b90 SHA-1: 3f39156a0cd5530200d176d3a6ccae255b3ede02 SHA-256: 040ee0cc5b42941faa88460d44d162e990cb52beef1c2dc334025aee579740f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malware. The document body, though heavily obfuscated, contains references to the malicious URL and other embedded links.

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=conventional%20energy%20and%20non%20conventional%20energy%20pdf
    • http://files.flyhiluv.com/uploads/1/3/0/7/130776791/725074.pdf
    • http://files.amcbride.org/uploads/1/3/1/3/131398338/7edae374ab1bd.pdf
    • http://tufudogu.tymprojects.site/uploads/1/3/1/8/131871478/sukomiwevabosuropa.pdf
    • http://lekodo.michiganburgerboys.com/uploads/1/3/0/8/130814161/poxup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/obesidad_bulimia_y_anorexia.pdf
    • https://cdn.shopify.com/s/files/1/0439/3415/4907/files/como_fazer_referencia_bibliografica_de_site_em.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/panera_bread_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5384/files/alimentation_saine_recette.pdf
    • https://cdn.shopify.com/s/files/1/0448/2118/4674/files/41109427117.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/fipetenatelekivudupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/losewubolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/kananinevegos.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/vocabulary_words_english_learn_with_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/zinakinege.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/el_atravesado_andres_caicedo_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/74861801861.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/40877073798.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_off000065a6.bin
9e54c2b28eaf9e754e99ac6cff5a1fb3dfaa085a8f11ef5e06a22c028cfabb08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A6 5212 bytes
font_01_sfnt_off00007780.bin
8ea625adc9fb11523684129480fdd41ea40f5663a26e5792cfaaf1f01f8ceaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10468 bytes

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