Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1d92fee4fed6ad…

MALICIOUS

PDF

45.5 KB Created: 2020-08-13 20:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3466fe2432b5e5a0131c7b0d51163fe8 SHA-1: c6594aa37ecfd867bb2b7a7aeb9cd35b4afba9cc SHA-256: 0e1d92fee4fed6ad2fb825f5bb9cb203370415f97b31388545f9d13d53362e14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to a malicious domain, suggesting an attempt to lead the user to a compromised or malicious site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=theory+of+alternating+current+machines+by+langsdorf+pdf
    • http://kunusa.kiahwilson.com/uploads/1/3/1/4/131437987/baxudepalu.pdf
    • http://nozibes.pragatipathik.org/uploads/1/3/2/8/132814930/c00d8e0.pdf
    • http://files.pantherlearningcenter.com/uploads/1/3/1/4/131406104/pedafomoludetexezu.pdf
    • http://mawusujed.atrimonta.com/uploads/1/3/0/7/130776487/f9d51c4f5eb9f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/xotubez.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/ribogonezasesifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/59781364448.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/retiro_de_sonda_vesical.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/26599929335.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/40446192876.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/agave_angustifolia_haw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/autocad_3d_drawing_practice.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/shirred_eggs_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/big_time_rush_oh_yeah.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/2771038807.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/zuxaxugumuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/mapa_mundi_paises_e_capitais.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_off00006c4c.bin
27bf726a7aee5f87465740d753eda70804a95d60c95d3fc2225482e0b041ab30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5760 bytes
font_01_sfnt_off00007fb8.bin
1a1f5d8e05d6a67b82a1bbbbd041a39e7df4489d249c3d52d5b684a59c501b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB8 11400 bytes