Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba52c6a95492158b…

MALICIOUS

PDF

48.6 KB Created: 2020-11-01 09:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d90493b68d5a4f068709dbc2dd51f47e SHA-1: 5cf6910a3976058a78e6ae34639e4a42f6794b93 SHA-256: ba52c6a95492158bc1b655a60a86c0652d143cd3227321f8b7d20b06f99e16ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially obfuscated, also contains this malicious URL and other links to PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

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.me/123?keyword=quantum+molecular+dynamics+software
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/jusidekevugeru.pdf
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/xopipevadaxa.pdf
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/8a14cbc.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/vepinifupunavir.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/5fbcb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0510/3550/4805/files/siverupixarevazula.pdf
    • https://cdn.shopify.com/s/files/1/0505/4893/2773/files/dinamica_sobre_el_perdon_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0501/0928/4515/files/37779556002.pdf
    • https://uploads.strikinglycdn.com/files/8101bc2f-54d2-43f2-8bfc-033d8c0b2b5b/8744784823.pdf
    • https://cdn.shopify.com/s/files/1/0500/5957/5482/files/crown_i_tech_4000_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0507/2565/0592/files/baixar_play_store_pro_apk_uptodown.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_off00007a3f.bin
4af9910e222e7e39498d9eef758c1bfad40ace27e6bfb4ae40566d16b7775255
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3F 5424 bytes
font_01_sfnt_off00008cb0.bin
775592052605d84f1ab38d6cf14065b71e2a35c89e157de5b6f88bca4b7b3f07
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 13172 bytes