Malicious PDF — malware analysis report

Static analysis result for SHA-256 120b1e50eb0450d2…

MALICIOUS

PDF

172.0 KB Created: 2020-08-12 02:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d71002141b36ca963b8abf512e2d727b SHA-1: 2b44189fe686a6d237a156aec22623962e314fae SHA-256: 120b1e50eb0450d22ec7a910da75b2d2abc14eb9c79452a9a0e3de158b215eb0
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL, https://ttraff.cc/pify?keyword=codigo+brasileiro+aeron%25C3%25A1utico+pdf, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the ML classifier and the redirector link strongly suggest this document is designed to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/pify?keyword=codigo+brasileiro+aeron%25C3%25A1utico+pdf
    • http://files.haleycloud.com/uploads/1/3/1/0/131069886/xobuwemex_dawaloxo_wanowupeji_lirodetilu.pdf
    • http://files.donfranciscocigarstoo.com/uploads/1/3/1/0/131071019/baketogijukola_koxalasowe_tofilubor.pdf
    • http://files.mrstartroom.com/uploads/1/3/2/6/132680852/1931012.pdf
    • http://files.fcaky.com/uploads/1/3/1/3/131383892/988875.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/88252951383.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/59768220649.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/sumerizovuralalisu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/kuviwasowixokupad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30899714004.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/normas_internacionales_de_auditoria_interna.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/90845167053.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/30712662138.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/noes_de_administrao_financeira_e_oramentria_concurso.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/induction_motor_speed_control_using_fuzzy_logic_controller.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/julimulofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/19200211423.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_off00026879.bin
a7be75464f4bf938ee71f9cce7c538747ae0c6717a375cdc744468a77087c6ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x26879 5604 bytes
font_01_sfnt_off00027b0a.bin
0ce3eb993778132a0c54d7fb3c68d42f073efe1b88339c9bc290f5d37529622d
pdf-font-stream PDF embedded font (sfnt) at offset 0x27B0A 11812 bytes