Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5001bd47c75d83e…

MALICIOUS

PDF

50.1 KB Created: 2020-10-28 13:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 591f73bf2a4d504c7e2962aa71c6c269 SHA-1: ea7eb5d7edcc90984e3d9f00868aa6a48e0a3b69 SHA-256: a5001bd47c75d83e6ba2e47604aa279f24c87375b5fc69e6cec4f7371d955bdf
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to `https://gettraff.ru/strik?keyword=avengers+earth%2527s+mightiest+heroes+ant+man+and+wasp`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://gettraff.ru/strik?keyword=avengers+earth%2527s+mightiest+heroes+ant+man+and+wasp In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f952534c7af9.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/noximove-zedafita-futito.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/0c512.pdfIn PDF document text
    • https://wawaxotev.weebly.com/uploads/1/3/4/3/134368025/04ef815230b4d40.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/libete_famomodizalodug_xeroxopizawokej.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/gulonumedalag_taduzunif.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/bazuxoxej_fopuz.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f88356877324.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/lekoxutawaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9268ce0a20f.pdfIn PDF document text
    • https://nezumise.weebly.com/uploads/1/3/4/2/134265586/zizitiboveji_sibete_kenatojuxajux_safaxonovusaxiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/knowledge_cleric_cantrips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2412/2524/files/kesogodemerinenuvavalun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/39737340250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826a6994-ae32-49ef-840f-be88a3df7272/lusagasoxuladitijidawul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/10455362132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5201/3985/files/pci_express_cem_3.0_specification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6738/7303/files/62577138204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84050d3c-ff62-4249-8d76-e416d05e4799/66739929285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6259/8067/files/jadisakusajejopetipitepi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C7 5516 bytes
SHA-256: 2e5a31a47f9d990f314475986317b18473b7dbdc0ecc8ed05d38f8a14666aa07
font_01_sfnt_off0000987f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x987F 9904 bytes
SHA-256: 83eac1ff2cdcc6a886db217c72934b93bb9a7d099a170a417c9ddb6f4e916dd9

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